At least 1,500 palaeoburrows have been found in southern Brazil. The tunnels are either 3.5 feet around or six feet tall and 12 feet wide — there’s definitely a noticeable size difference between the types. The burrows are complex systems and some are longer than others. Photo Credit: watchJojo / YouTube

Size Differences

Today's Image of the Day from the European Space Agency features the spiral galaxy IC 5332, which is located over 29 million light-years away from Earth.



The galaxy spans approximately 66,000 light-years in diameter. This makes it notably smaller than our <a href="https://www.earth.com/news/large-amount-of-dark-matter-may-be-missing-from-the-milky-way/" target="_blank" rel="noreferrer noopener">Milky Way</a>, which is just over 100,000 light-years in diameter. 



<h2 class="wp-block-heading" id="h-unprecedented-look-at-ic-5332">Unprecedented look at IC 5332</h2>



In a stunning photo release by NASA and ESA in 2022, the spiral galaxy IC 5332 was presented in an unprecedented level of detail. The images were captured by the <a href="https://www.earth.com/news/james-webb-captures-incredible-new-image-of-uranus/" target="_blank" rel="noreferrer noopener">James Webb Space Telescope</a>.



This feat was made possible through the use of the Mid-InfraRed Instrument (MIRI), which captures images in the mid-infrared spectrum.



<h2 class="wp-block-heading" id="h-unique-perspective-from-earth">Unique perspective from Earth</h2>



One of the most striking features of IC 5332, as revealed by these observations, is its almost perfect face-on orientation relative to Earth.&nbsp;



This unique perspective allows astronomers to clearly observe and admire the symmetrical arrangement of its spiral arms.



<h2 class="wp-block-heading" id="h-webb-unveils-ic-5332-in-new-light">Webb unveils IC 5332 in new light</h2>



The clarity of these images represents a significant advancement over previous observations made by the Hubble Space Telescope, which imaged IC 5332 in ultraviolet and visible light.&nbsp;



While Hubble’s images revealed the galaxy’s symmetrical spiral arms, James Webb’s MIRI has unveiled these structures as a complex web of gas that emits infrared light at various temperatures.



<h2 class="wp-block-heading" id="h-the-miri-instrument-on-james-webb-nbsp">The MIRI instrument on James Webb&nbsp;</h2>



Capturing this range of infrared light is no simple task. It requires highly specialized instruments that must be maintained at extremely cold temperatures.&nbsp;



The MIRI instrument on the James Webb Space Telescope is specifically designed for this purpose and performs exceptionally well. Its capabilities allow astronomers to see aspects of <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/" target="_blank" rel="noreferrer noopener">galaxies</a> that are otherwise hidden in other wavelengths.



The detailed images provided by MIRI offer more than just a visual spectacle; they provide valuable data about the composition and temperature of the gases that make up the spiral arms of IC 5332. 



This can help scientists understand the processes of star formation within the galaxy and how these processes compare to those in our own <a href="https://www.earth.com/news/stars-at-the-edge-of-our-milky-way-galaxy-travel-more-slowly/" target="_blank" rel="noreferrer noopener">Milky Way</a>.



<h2 class="wp-block-heading" id="h-webb-finds-hidden-features-of-the-universe-nbsp">Webb finds hidden features of the universe&nbsp;</h2>



The images of IC 5332 served as a critical test of the James Webb Space Telescope’s capabilities in observing the universe in infrared light. 



As astronomers continue to explore with Webb’s full suite of instruments, many more hidden features of the universe will be revealed.



The information provided by the <a href="https://www.earth.com/news/webb-telescope-discovers-second-most-distant-galaxy-in-pandoras-cluster/" target="_blank" rel="noreferrer noopener">James Webb Space Telescope</a> not only expands our understanding of the cosmos but also enhances our appreciation for the complex and beautiful structures that exist in our universe.&nbsp;



<h2 class="wp-block-heading" id="h-spiral-galaxies-like-ic-5332">Spiral galaxies like IC 5332</h2>



Spiral galaxies are some of the most visually striking objects in the universe, characterized by their rotating arms that extend from a central nucleus, giving them a distinct spiral appearance.&nbsp;



These galaxies are primarily made up of a flat, rotating disk containing stars, gas, and dust, and a central concentration of stars known as the bulge. These are often surrounded by a much fainter halo of stars, many of which reside in globular clusters.



Spiral galaxies differ from other galaxy types, such as elliptical and irregular galaxies, in their structure and content. 



The spiral arms are sites of ongoing star formation and are brighter than the rest of the disk because of the young, hot stars that are typically found there. The arms appear distinct because of their density waves, which compress the gas and dust, leading to star formation.



The rotation of the spiral arms also contributes to the galaxy's flat shape due to the centrifugal forces acting on the disk. The central bulge can vary in size and often contains older, red stars.&nbsp;



<h2 class="wp-block-heading" id="h-barred-spiral-galaxies-nbsp">Barred spiral galaxies&nbsp;</h2>



Some spiral galaxies have a bar-shaped structure that extends from the central bulge, making them barred spirals. This bar affects the motion of stars and gas within the galaxy and can influence star formation activity.



Spiral galaxies are an important focus of study because they contain a significant amount of visible matter and play a crucial role in understanding the formation and evolution of galaxies.&nbsp;



Their distinct features also make them particularly useful for studying the laws of physics under extreme conditions, such as high densities and velocities.



Image Credit: <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>/Webb, NASA &amp; CSA, J. Lee and the PHANGS-JWST and PHANGS-HST Teams



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Spiral galaxy IC 5332: A complex web of gas and light

Today's Image of the Day from the European Space Agency...

Today's Image of the Day from the European Space Agency features the star-forming region NGC 604, which is located 2.73 million light-years away from Earth in the Triangulum Galaxy (M33). The image was captured by the James Webb Space Telescope.



By studying regions like NGC 604, astronomers can gain insights into the complex interactions between stars and the interstellar medium, as well as the conditions that lead to the birth of stars. This, in turn, helps in understanding the evolution of <a href="https://www.earth.com/news/galaxies-like-our-own-milky-way-are-not-unique/" target="_blank" rel="noreferrer noopener">galaxies</a> and the universe as a whole.



<h2 class="wp-block-heading" id="h-massive-stars-of-ngc-604">Massive stars of NGC 604</h2>



"Sheltered among NGC 604’s dusty envelopes of gas are more than 200 of the hottest, most massive kinds of stars, all in the early stages of their lives," said <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



"These types of stars are known as B-types and O-types, the latter of which can be more than 100 times the mass of our own Sun. It’s quite rare to find this concentration of them in the nearby universe. In fact, there’s no similar region within our own Milky Way galaxy."



According to ESA, this concentration of massive stars, combined with its relatively close distance, means NGC 604 gives astronomers an opportunity to study these objects at a fascinating time early in their life.



<h2 class="wp-block-heading" id="h-gigantic-region-of-ionized-hydrogen">Gigantic region of ionized hydrogen</h2>



NGC 604 is one of the largest known regions of ionized hydrogen, also known as an H II region. This nebula is significantly larger than the Orion Nebula, which is one of the most well-known H II regions in our own <a href="https://www.earth.com/news/large-amount-of-dark-matter-may-be-missing-from-the-milky-way/" target="_blank" rel="noreferrer noopener">Milky Way galaxy</a>.&nbsp;



NGC 604 spans about 1,500 light-years across, making it one of the largest H II regions in the Local Group of galaxies. This group includes the Milky Way, the Andromeda Galaxy, and about 54 other smaller galaxies. 



<h2 class="wp-block-heading" id="h-ngc-604-starburst-phenomenon">NGC 604 starburst phenomenon </h2>



Within NGC 604, there are hundreds of young, hot, massive <a href="https://www.earth.com/news/stars-at-the-edge-of-our-milky-way-galaxy-travel-more-slowly/" target="_blank" rel="noreferrer noopener">stars</a>. These stars have ionized the surrounding gas, causing it to glow and creating the nebula. The region is a prime example of a starburst phenomenon, where stars form at a much higher rate than in typical galactic conditions.



“The bright orange streaks in this image signify the presence of carbon-based molecules known as polycyclic aromatic hydrocarbons, or PAHs," explained ESA.



"As you travel further from the immediate cavities of dust where the star is forming, the deeper red signifies molecular hydrogen. This cooler gas is a prime environment for star formation. Ionized hydrogen from ultraviolet radiation appears as a white and blue ghostly glow."



<h2 class="wp-block-heading" id="h-more-about-star-formation">More about star formation </h2>



Star formation is crucial for the evolution of galaxies and the synthesis of heavy elements. In the cores of stars, elements heavier than helium are created.



The elements are spread throughout the <a href="https://www.earth.com/news/ancient-stars-shakti-shiva-shaped-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">galaxy</a> when stars reach the end of their lives and expel their material - either gently through winds or violently via supernova explosions. This enriching process allows for the formation of new stars and planets, and ultimately, the potential for life.



<h3 class="wp-block-heading">Cloud collapse</h3>



The process begins when part of a molecular cloud becomes unstable and starts to collapse under its own gravity. This can be triggered by events like shock waves from nearby <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, galactic collisions, or the influence of other massive stars.



<h3 class="wp-block-heading">Formation of a protostar</h3>



As the cloud collapses, it fragments into smaller clumps. Each clump will eventually form one or more stars. 



The material within these clumps continues to fall inward, heating up as it does so, eventually forming a warm core called a protostar. At this stage, the protostar is not yet hot enough for nuclear fusion (the process that powers stars) to occur.



<h3 class="wp-block-heading">Accretion disk</h3>



Around the protostar, material from the surrounding cloud continues to fall inward, forming a rotating disk. This material slowly accretes onto the protostar, increasing its mass.



<h3 class="wp-block-heading">Nuclear fusion begins</h3>



Once the core of the protostar reaches a high enough temperature and pressure, hydrogen atoms begin to fuse into helium, releasing energy in the process. This marks the transition from a protostar to a main sequence star, like our sun.



<h3 class="wp-block-heading">Main sequence and beyond</h3>



The star will spend the majority of its life in the main sequence stage, where it balances the gravitational forces trying to collapse it and the outward pressure from nuclear fusion. 



Eventually, the star will exhaust its hydrogen fuel. Its subsequent evolution will depend on its initial mass, leading to various end stages such as red giants, supernovae, neutron stars, or black holes.



Image Credit: NASA/ESA/CSA James Webb Space Telescope



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Young, massive stars in the Triangulum Galaxy

Today's Image of the Day from NASA Earth Observatory features the Ruki River in the Democratic Republic of the Congo (DRC). It is a tributary of the Congo River, one of the largest rivers in the world by discharge and depth.&nbsp;



The Ruki River, previously known as the Busira, merges with the Momboyo River near the town of Basankusu to become the Lulonga River, which eventually flows into the Congo River at the town of Lisala.



<h2 class="wp-block-heading" id="h-dark-waters-of-the-ruki-river">Dark waters of the Ruki River</h2>



"If the appearance of the muddy Amazon River evokes a coffee cut with cream, the Ruki River, coursing gently through the Congo Basin, is like a dark tea," said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



"On its slow path through mostly untouched lowland rainforest in the Democratic Republic of Congo (DRC), the water leaches organic material from vegetation, prompting some researchers to think it is one of the darkest blackwater rivers on Earth."



According to NASA, scientists are finding that the dissolved material in this distinctive water offers clues about the carbon cycle of tropical forests.



<h2 class="wp-block-heading" id="h-organic-compounds-in-the-ruki-river">Organic compounds in the Ruki River</h2>



In a recent study, researchers measured the chemical <a href="https://www.earth.com/news/warmer-rivers-keep-antimicrobial-resistant-genes-at-bay/" target="_blank" rel="noreferrer noopener">composition</a> and flow of the Ruki for the first time.&nbsp;



"The study reported that, as the water color suggests, the Ruki is rich in dissolved organic carbon compounds," said NASA.



"It contains four times as much organic carbon as the Congo River and 1.5 times as much as the Rio Negro, the world’s largest blackwater river and a major tributary of the Amazon."



Due to this heavy carbon load, the researchers concluded that tropical forests like those around the Ruki might not accumulate quite as much carbon as we once thought.



<h2 class="wp-block-heading" id="h-significance-of-the-river">Significance of the river </h2>



The river is vital for the livelihoods of local communities. <a href="https://www.earth.com/news/fishing-communities-cooperate-to-survive-climate-change/" target="_blank" rel="noreferrer noopener">Fishing</a> is a crucial activity, with many people depending on it for sustenance and income. The river also supports agriculture along its banks, where communities grow crops.



In many parts of the DRC, <a href="https://www.earth.com/news/rivers-are-warming-up-and-losing-oxygen-faster-than-oceans/" target="_blank" rel="noreferrer noopener">rivers</a> like the Ruki are crucial transportation corridors due to the challenging and often nonexistent road infrastructure. 



The river enables the movement of people and goods, facilitating trade and access to markets, health care, and education.



<h2 class="wp-block-heading" id="h-wildlife-of-the-ruki-river">Wildlife of the Ruki River </h2>



The region around the Ruki River is home to diverse wildlife. It is part of the Congo Basin, the second-largest tropical rainforest area in the world, which is a critical habitat for endangered species.



Among the most notable species are elephants and <a href="https://www.earth.com/news/study-mean-chimpanzees-fare-better-in-life-than-nice-ones/" target="_blank" rel="noreferrer noopener">chimpanzees</a>, whose populations thrive in the surrounding forests. Other primates such as bonobos also live in this region, making it a critical area for primate conservation.



The river itself is home to various species of fish that are crucial to local livelihoods. Hippopotamuses and crocodiles are often found in the water.



Birds like kingfishers, herons, and egrets frequent the riverbanks - making it a haven for birdwatchers.



The Ruki River also supports several species of reptiles and amphibians - some of which are unique to the region.



<h2 class="wp-block-heading" id="h-managing-the-river-s-resources">Managing the river's resources </h2>



The region faces several challenges, including <a href="https://www.earth.com/news/global-deforestation-directly-linked-to-atmospheric-mercury-emissions/" target="_blank" rel="noreferrer noopener">deforestation</a>, overfishing, and environmental degradation, which threaten its ecological balance and the livelihoods of people who depend on it. 



Efforts to manage and conserve the river's resources are vital for sustainable development.



Understanding and protecting the Ruki River and its surroundings are crucial for the DRC's environmental sustainability, economic development, and the well-being of its communities.



<h2 class="wp-block-heading" id="h-landscapes-of-the-drc">Landscapes of the DRC</h2>



The Democratic Republic of Congo (DRC) boasts some of the most diverse and breathtaking landscapes in Africa, reflecting its vast size and ecological richness. Dominated by the Congo Basin, the country is a haven for biodiversity.



Beyond its rainforests, the DRC's landscapes shift dramatically. In the east, the terrain rises into rugged mountains, including the Virunga and Rwenzori ranges, where snow-capped peaks like Mount Stanley pierce the sky. 



This region is also marked by active volcanoes such as Mount Nyiragongo, which harbors one of the world’s largest lava lakes, creating a dramatic and otherworldly spectacle.



To the south and west, the country transitions to expansive savannas with rolling grasslands and scattered trees. These areas contrast sharply with the lushness of the forests, providing vital habitats for species like lions and antelope. 



Rivers like the Ruki are a dominant feature, with the mighty Congo River coursing through the heart of the country. Its tributaries shape the lives of millions.



The image was captured by the OLI (Operational Land Imager) on Landsat 8.



Image Credit: NASA Earth Observatory&nbsp;



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Ruki River in the Democratic Republic of the Congo

Today's Image of the Day from NASA Earth Observatory features...

Today's Image of the Day from the European Space Agency features a brilliant stellar nursery located about 163,000 light-years away.



According to ESA, the image is one of the most photogenic examples of the many stellar nurseries observed by the NASA/ESA Hubble Space Telescope during its 30-year lifetime. 



“The portrait features the giant nebula NGC 2014 and its neighbor NGC 2020 which together form part of a vast star-forming region in the Large Magellanic Cloud, a satellite galaxy of the Milky Way,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



<h2 class="wp-block-heading" id="h-what-is-a-stellar-nursery">What is a stellar nursery?</h2>



Stellar nurseries are regions in space where new stars are <a href="https://www.earth.com/news/baby-stars-release-sneezes-of-gas-and-dust-as-they-develop/" target="_blank" rel="noreferrer noopener">born</a> - often within vast clouds of gas and dust called molecular clouds.&nbsp;



These areas are fascinating because they are cradles of stellar evolution, where gravity causes clumps of gas to collapse, eventually forming protostars.&nbsp;



Over time, the protostars will heat up and start the nuclear fusion process that powers a star.



One of the most well-known stellar nurseries is the Orion Nebula, which is visible to the naked eye and located about 1,350 light-years from Earth.&nbsp;



<h2 class="wp-block-heading" id="h-dynamic-nature-of-a-stellar-nursery-nbsp">Dynamic nature of a stellar nursery&nbsp;</h2>



Within these nurseries, the balance between gravity and pressure determines the types of stars that form, from massive, luminous stars to smaller, cooler ones like our Sun.&nbsp;



The environment is incredibly dynamic, with powerful winds from young stars shaping the clouds and triggering the birth of even more stars.



These regions are often illuminated by the light from massive newborn stars - creating stunning, colorful displays. The light reveals the intricate structure of the dust and gas, sculpted by the energy of young stars.&nbsp;



<h2 class="wp-block-heading" id="h-significance-of-stellar-nurseries-nbsp">Significance of stellar nurseries&nbsp;</h2>



Stellar nurseries are essential for understanding the early stages of planetary formation, as protoplanetary disks (the material from which <a href="https://www.earth.com/news/planet-formation-new-insights-mechanics-physics/" target="_blank" rel="noreferrer noopener">planets form</a>) are often found around young stars in these regions.



Stellar nurseries play a crucial role in the ongoing evolution of <a href="https://www.earth.com/news/black-hole-is-starving-its-host-galaxy-of-star-forming-fuel/" target="_blank" rel="noreferrer noopener">galaxies</a>. They are responsible for the continuous birth of new stars that enrich the interstellar medium with heavier elements. This constant recycling of material is key to the development of future generations of stars and planets.&nbsp;



Furthermore, the study of these regions helps astronomers understand the fundamental processes that govern the life cycles of stars and the overall dynamics of the universe.



<h2 class="wp-block-heading" id="h-the-local-group">The Local Group</h2>



The Local Group is a collection of over 80 galaxies that includes the Milky Way, the Andromeda Galaxy, and the Triangulum Galaxy, along with numerous smaller dwarf galaxies. These galaxies are bound together by gravity and span a region roughly 10 million light-years across.&nbsp;



The <a href="https://www.earth.com/news/milky-ways-thin-disk-is-billions-of-years-older-than-we-thought/" target="_blank" rel="noreferrer noopener">Milky Way</a> and Andromeda are the dominant members, with their respective satellite galaxies orbiting them.&nbsp;



The Local Group is part of a larger structure known as the Virgo Supercluster, and its galaxies are moving toward the gravitational center of the Local Group, contributing to its dynamic nature.&nbsp;



<h2 class="wp-block-heading" id="h-large-magellanic-cloud">Large Magellanic Cloud</h2>



The Large Magellanic Cloud (LMC) is the fourth largest galaxy in the Local Group and can be seen with the naked eye from the Southern Hemisphere.&nbsp;



This irregular dwarf galaxy is home to the Tarantula Nebula, one of the most active star-forming regions in our cosmic neighborhood.&nbsp;



The Large Magellanic Cloud played a key role in astronomical history, particularly when the supernova SN 1987A was observed, providing valuable insights into stellar evolution.&nbsp;



The LMC's interaction with the Milky Way, along with its own companion, the Small Magellanic Cloud, is believed to influence its shape and star formation activity. Its proximity and unique properties make it a crucial object of study for understanding <a href="https://www.earth.com/news/massive-galactic-explosion-provides-clues-about-galaxy-evolution/" target="_blank" rel="noreferrer noopener">galaxy evolution</a>, star formation, and the dynamics of interacting galaxies.



Image Credit: NASA, ESA, and STScI



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Hubble captures a stunning stellar nursery

Today's Image of the Day from the European Space Agency features the Southern Ring Nebula, also known as NGC 3132.



The nebula is located about 2,000 light-years away from Earth in the constellation Vela. This remarkably detailed image was created using data from Webb’s Near-Infrared Camera (NIRCam).



The Southern Ring Nebula is one of the more famous examples of planetary nebulae. It is often studied for its beauty and valuable insights into the end stages of stellar evolution.



<h2 class="wp-block-heading" id="h-stars-power-the-southern-ring-nebula-nbsp">Stars power the Southern Ring Nebula&nbsp;</h2>



The <a href="https://www.earth.com/news/dragons-egg-nebula-is-a-truly-stunning-sight-to-behold/" target="_blank" rel="noreferrer noopener">nebula</a> is powered by two central stars in a binary system. The brighter star is actually a less massive companion. The fainter, dimmer star is the dying, hot central star that has shed its outer layers to form the nebula. 



The dimmer star is a white dwarf and is responsible for the ionization of the gas in the nebula, causing it to glow.



“The bright star at the center of NGC 3132, while prominent when viewed by NASA’s Webb Telescope in near-infrared light, plays a supporting role in sculpting the surrounding nebula," noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



"A second star, barely visible at lower left along one of the bright star’s diffraction spikes, is the nebula’s source. It has ejected at least eight layers of gas and dust over thousands of years.” 



“But the bright central star visible here has helped ‘stir’ the pot, changing the shape of this planetary nebula’s highly intricate rings by creating turbulence." 



ESA explained that the pair of stars are locked in a tight orbit, which leads the dimmer star to spray ejected material in a range of directions as they orbit one another, resulting in these jagged rings.



<h2 class="wp-block-heading" id="h-key-characteristics-of-the-southern-ring-nebula-nbsp">Key characteristics of the Southern Ring Nebula&nbsp;</h2>



The Southern Ring Nebula displays a complex structure with multiple layers of gas and dust. 



The outer shells of the nebula consist of hydrogen and other elements that were ejected from the dying star in previous stages of its <a href="https://www.earth.com/news/young-stellar-objects-observing-the-early-lives-of-stars/" target="_blank" rel="noreferrer noopener">evolution</a>. These layers are illuminated by ultraviolet radiation from the central white dwarf.



<h3 class="wp-block-heading" id="h-coloration">Coloration</h3>



The colors seen in the Southern Ring Nebula come from the different gases present. For example, hydrogen emits red light, while oxygen emits blue-green light. 



These colors help astronomers study the composition and dynamics of the nebula.



<h3 class="wp-block-heading" id="h-size-and-shape">Size and shape</h3>



The nebula spans about half a light-year in diameter. Its intricate, symmetrical structure provides valuable insights into the late stages of <a href="https://www.earth.com/news/star-collapse-black-hole-instead-of-supernova-vanish-from-sky/" target="_blank" rel="noreferrer noopener">stellar evolution</a>, especially the processes involved in the shedding of outer layers by dying stars.



<h2 class="wp-block-heading" id="h-spotlights-from-the-bright-star">Spotlights from the bright star</h2>



ESA noted that hundreds of straight, brightly-lit lines pierce through the rings of gas and dust. “These ‘spotlights’ emanate from the bright star and stream through holes in the nebula like sunlight through gaps in a cloud."



“But not all of the starlight can escape. The density of the central region, set off in teal, is reflected by how transparent or opaque it is. Areas that are a deeper teal indicate that the gas and dust are denser - and light is unable to break free.”



<h2 class="wp-block-heading" id="h-more-about-the-image">More about the image</h2>



According to ESA, this is not only a crisp image of a planetary nebula - it also shows us objects in the vast distances of space behind it. The transparent red sections of the nebula are filled with distant <a href="https://www.earth.com/news/galaxies-have-hearts-and-lungs-that-help-them-live-longer/" target="_blank" rel="noreferrer noopener">galaxies</a>.



“Look for the bright angled line at the upper left. It is not starlight - it is a faraway galaxy seen edge-on. Distant spirals, of many shapes and colors, also dot the scene. Those that are farthest away - or very dusty - are small and red,” said ESA.



<h2 class="wp-block-heading" id="h-the-constellation-vela-nbsp">The constellation Vela&nbsp;</h2>



Vela is a southern constellation that represents the sails of a ship. It was once part of a larger constellation called Argo Navis, which depicted the ship of the mythological hero Jason and the Argonauts. 



In the 18th century, Argo Navis was divided into three separate constellations: Vela (the sails), Carina (the keel), and Puppis (the stern).



Vela is notable for containing several interesting astronomical features. One of its most prominent stars is Gamma Velorum, also known as Suhail or Regor, which is a bright, massive star system consisting of multiple stars.&nbsp;



The constellation also hosts the Vela Supernova Remnant, the remains of a <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernova</a> explosion that occurred about 11,000 years ago. 



This remnant is associated with the Vela Pulsar, a neutron star that formed during the supernova explosion, which is one of the brightest pulsars in the sky.



Vela is best observed in the Southern Hemisphere, where it can be seen in the summer months. Its position along the Milky Way makes it a popular region for both amateur and professional astronomers to explore.



Image Credit: NASA, ESA, CSA, STScI



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Southern Ring Nebula in the constellation Vela 

Today's Image of the Day from the European Space Agency features NGC 6744 - a large, barred spiral galaxy located approximately 30 million light-years away in the constellation Pavo.&nbsp;



The galaxy is often considered a close analog to the <a href="https://www.earth.com/news/uma3-u1-faintest-star-system-found-orbiting-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">Milky Way</a> due to its similar structure and size, spanning about 175,000 light-years across.&nbsp;



<h2 class="wp-block-heading" id="h-euclid-space-mission-nbsp">Euclid space mission&nbsp;</h2>



The image was captured by the <a href="https://www.esa.int/Science_Exploration/Space_Science/Euclid" target="_blank" rel="noreferrer noopener">Euclid</a> space telescope. NGC 6744 stands out as a prime example of the galaxies currently forming the majority of stars in the nearby universe, making it an ideal subject for study with the Euclid mission.&nbsp;



Euclid’s extensive field-of-view allows it to capture the entire galaxy, showcasing not only its large-scale spiral structure but also revealing intricate details on smaller scales across various wavelengths. These details include feather-like dust lanes, known as “spurs,” emerging from the spiral arms.



<h2 class="wp-block-heading" id="h-star-formation-in-ngc-6744">Star formation in NGC 6744</h2>



Euclid's observations enable scientists to count individual stars within NGC 6744, trace the distribution of stars and dust throughout the galaxy, and map the dust associated with the gas that fuels the development of new stars. 



<a href="https://www.earth.com/news/baby-stars-release-sneezes-of-gas-and-dust-as-they-develop/" target="_blank" rel="noreferrer noopener">Star formation</a> is a key process in the growth of galaxies, making these studies crucial for understanding galaxy evolution.



Researchers are utilizing Euclid’s data to explore the relationship between dust, gas, and star formation; to map the distribution of different stellar populations and identify regions of active star formation; and to investigate the underlying physics of spiral galaxy structures.&nbsp;



Spiral arms play a significant role in star formation by compressing gas, yet the precise mechanisms behind this process are still unclear. The presence of “spurs” along NGC 6744’s spiral arms offers valuable insights into the dynamics of star formation within these structures.



<h2 class="wp-block-heading" id="h-discovering-new-dwarf-galaxies-nbsp">Discovering new dwarf galaxies&nbsp;</h2>



Additionally, Euclid's dataset will help scientists identify clusters of old stars (globular clusters) and discover new dwarf galaxies around NGC 6744. Remarkably, Euclid has already identified a new dwarf satellite galaxy of NGC 6744 - a surprising discovery given that the galaxy has been studied extensively.



With Euclid’s detailed observations, scientists are gaining a deeper understanding of the processes shaping galaxies, providing essential clues to the evolution and appearance of the <a href="https://www.earth.com/news/universes-expansion-rate-hubble-tension-puzzles-astronomers/" target="_blank" rel="noreferrer noopener">universe</a>.



<h2 class="wp-block-heading" id="h-more-about-ngc-6744">More about NGC 6744</h2>



NGC 6744's disk is rich in star-forming regions and contains numerous young, bright blue stars. The galaxy's nucleus is slightly elongated and has a bar structure, which influences the motion of the stars and gas within it.&nbsp;



The spiral arms of NGC 6744 are well-defined and extend outward, wrapping around the central bar. Additionally, NGC 6744 has a smaller companion galaxy, NGC 6744A, which is interacting with it, adding to the complexity and interest of this distant system.&nbsp;



<h2 class="wp-block-heading" id="h-spiral-galaxies">Spiral galaxies</h2>



<a href="https://www.earth.com/news/the-mesmerizing-beauty-of-spiral-galaxies/" target="_blank" rel="noreferrer noopener">Spiral galaxies</a> are one of the most common types of galaxies in the universe, characterized by their distinct, spiral-shaped structure.&nbsp;



The galaxies typically consist of a flat, rotating disk containing stars, gas, and dust, along with a central concentration of stars known as the bulge. This bulge is often surrounded by a halo of older stars.&nbsp;



The spiral arms, which extend from the central bulge, are regions of active star formation and are rich in young, hot stars, giving them a bright, bluish appearance.&nbsp;



These arms are also sites where interstellar gas and dust are concentrated, leading to the formation of new stars.&nbsp;



Spiral galaxies are classified into different types based on the tightness of their spirals and the size of their central bulge, with classifications ranging from tightly wound arms in Sa galaxies to more loosely wound arms in Sc galaxies. The <a href="https://www.earth.com/news/large-amount-of-dark-matter-may-be-missing-from-the-milky-way/" target="_blank" rel="noreferrer noopener">Milky Way</a>, our home galaxy, is a prime example of a spiral galaxy.



<h2 class="wp-block-heading" id="h-the-constellation-pavo">The constellation Pavo</h2>



Pavo, which means "peacock" in Latin, is a constellation in the southern sky. It was named by the Dutch astronomer Petrus Plancius in the late 16th century, based on observations made during the Dutch explorations of the southern hemisphere. 



Pavo is one of the 12 constellations created by Plancius from the records of explorers Pieter Dirkszoon Keyser and Frederick de Houtman. 



The constellation is known for its distinctive shape, resembling a peacock with a long, curved tail. Pavo is not visible from most of the northern hemisphere, but it can be seen from the southern hemisphere, particularly during the winter months.



The constellation contains several interesting celestial objects, including the star Peacock, also known as Alpha Pavonis, which is the brightest star in the constellation. This star is a blue-white subgiant located about 179 light-years from Earth.



Image Credit: <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>/Euclid/Euclid Consortium/NASA&nbsp;



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Spiral galaxy NGC 6744 in the constellation Pavo

Today's Image of the Day from the European Space Agency features the Little Dumbbell Nebula, also known as Messier 76, located in the constellation Perseus 3,400 light-years away from Earth.



Astronomers captured this image of the Little Dumbbell Nebula to commemorate the 34th anniversary of the Hubble Space Telescope, a joint venture between NASA and the European Space Agency (<a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>).



The snapshot provides not only a breathtaking view but also deep insights into the life cycle of <a href="https://www.earth.com/news/dark-stars-scientists-discover-a-new-type-of-star-powered-by-dark-matter/" target="_blank" rel="noreferrer noopener">stars</a> and the dynamic processes within nebulae.



<h2 class="wp-block-heading" id="h-understanding-messier-76">Understanding Messier 76</h2>



Messier 76 is categorized as a planetary nebula - a term which refers to its round, planet-like appearance when viewed through early, low-power telescopes. 



However, the term is somewhat misleading as planetary nebulae have no connection to actual <a href="https://www.earth.com/news/nasa-finds-17-exoplanets-that-have-oceans-and-possibly-alien-life/" target="_blank" rel="noreferrer noopener">planets</a>. 



Instead, they represent an expansive shell of luminous gases expelled by a dying red giant star, which subsequently collapses into a dense, hot white dwarf. 



This transformation marks the late stages of stellar evolution for medium to low-mass stars.



<h2 class="wp-block-heading" id="h-structure-of-messier-76">Structure of Messier 76</h2>



The structure of Messier 76 is particularly notable. It includes a central ring, giving the appearance of a bar-like feature, with two distinct lobes emanating from either side. 



This formation is believed to be the result of materials ejected by the star during its red giant phase, possibly sculpted by interactions with a companion star. 



Although this binary companion is not visible in current Hubble images, its presence is inferred from the thick disk of dust and gas aligned with its orbital plane. 



The phenomenon of the companion star potentially being absorbed by the primary star, a process akin to stellar cannibalism, is a captivating aspect of the nebula's history.



<h2 class="wp-block-heading" id="h-the-dynamic-environment-of-the-nebula">The dynamic environment of the nebula</h2>



At the core of the nebula, the primary star, now collapsing into a <a href="https://www.earth.com/news/white-dwarf-stars-may-be-billions-of-years-older-than-estimated/" target="_blank" rel="noreferrer noopener">white dwarf</a>, reaches extreme temperatures. This heat is estimated to be 120,000 degrees Celsius - about 24 times hotter than the surface of our Sun. 



This intensely hot remnant is visible as a small, bright point at the center of the nebula. Directly below this, another star can be seen; however, it is merely aligned with the nebula by chance and is not a part of it.



<h2 class="wp-block-heading" id="h-powerful-glow-of-messier-76">Powerful glow of Messier 76</h2>



The dynamics within Messier 76 are driven by powerful forces. The central disk seems to constrict the material, creating two lobes of gas escaping along the rotational axis of the star, perpendicular to the disk.&nbsp;



The lobes are propelled outward by a potent stellar wind, moving at a staggering two million miles per hour. This rapid movement is sufficient to travel the distance from Earth to the <a href="https://www.earth.com/news/timeless-mystery-solved-scientists-uncover-what-is-inside-the-moons-core/" target="_blank" rel="noreferrer noopener">Moon</a> in just over seven minutes.&nbsp;



The collision of the fast-moving gas with older, slower-moving material ejected during the star’s red giant phase results in the stunning glowing effect seen in the nebula. 



The glow, ignited by the ultraviolet radiation from the white dwarf, is a spectacle of colors with red emanating from nitrogen and blue from oxygen.



<h2 class="wp-block-heading" id="h-a-cosmic-moment-in-time">A cosmic moment in time</h2>



Despite its current brilliance, the existence of the Little Dumbbell Nebula is fleeting on a cosmological scale. It is expected to last only about 15,000 years - a mere moment in the lifespan of the <a href="https://www.earth.com/news/dark-energy-is-ripping-the-universe-apart-but-we-arent-sure-how/" target="_blank" rel="noreferrer noopener">universe</a>. 



This brief period highlights the transient nature of such cosmic phenomena, which, while short-lived, provide crucial insights into the mechanics of stellar evolution and the complex interactions within these celestial sculptures.



<h2 class="wp-block-heading" id="h-more-about-messier-76">More about Messier 76</h2>



Messier 76 was discovered by Pierre Méchain in 1780. It was later cataloged by Charles Messier, who included it in his famous list of nebulous objects.



The nebula's faintness and small size require a good telescope to be observed effectively, with larger telescopes able to reveal more of its fine details and structure.



Studying Messier 76 helps astronomers understand the life cycle of stars and the processes that occur during the late stages of stellar evolution. 



The materials expelled by planetary nebulae like Messier 76 eventually contribute to the interstellar medium, from which new stars and planetary systems may form.



Image Credit: ESA Space Agency&nbsp;



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Secrets of the Little Dumbbell Nebula  

Today's Image of the Day from the European Space Agency features the galaxy I Zwicky 18, which was captured in remarkable detail by the James Webb Space Telescope.



I Zwicky 18 is a blue compact dwarf <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">galaxy</a> located approximately 59 million light-years away in the constellation Ursa Major.&nbsp;



<h2 class="wp-block-heading" id="h-star-formation-in-i-zwicky-18">Star formation in I Zwicky 18</h2>



The galaxy is notable for its relatively young appearance and the fact that it contains very few heavy elements. These characteristics indicate that it has experienced little <a href="https://www.earth.com/news/baby-stars-release-sneezes-of-gas-and-dust-as-they-develop/" target="_blank" rel="noreferrer noopener">star formation</a> compared to other galaxies of similar age.



“The galaxy was first identified by Swiss astronomer Fritz Zwicky in the 1930’s and resides roughly 59 million light-years from Earth,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>. “This galaxy has gone through several sudden bursts of star formation.”&nbsp;



According to ESA, I Zwicky 18 is typical of the kinds of galaxies that inhabited the early universe and is much smaller than our <a href="https://www.earth.com/news/runaway-star-j1249-36-spotted-trying-to-escape-our-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">Milky Way</a>.



<h2 class="wp-block-heading" id="h-webb-telescope-image-of-the-galaxy">Webb telescope image of the galaxy</h2>



“Two major starburst regions are embedded in the heart of the galaxy. The wispy brown filaments surrounding the central starburst region are bubbles of gas that have been heated by stellar winds and intense ultraviolet radiation unleashed by hot, young stars,” noted ESA.



“A companion galaxy resides nearby to the dwarf galaxy, which can be seen at the bottom of the wider-field image. The companion may be interacting with the dwarf galaxy and may have triggered that galaxy's recent star formation.”&nbsp;



ESA explained that the “orange blobs” surrounding the galaxy are the dim glow from ancient fully formed galaxies at much larger distances.



<h2 class="wp-block-heading" id="h-key-characteristics-of-i-zwicky-18">Key characteristics of I Zwicky 18</h2>



As previously mentioned, the galaxy has a very low abundance of elements heavier than hydrogen and helium, suggesting that it has not undergone significant stellar processing.



<h3 class="wp-block-heading" id="h-young-stellar-population-nbsp">Young stellar population&nbsp;</h3>



Despite its old age, I Zwicky 18 contains many young, hot stars. This suggests that it might have experienced a burst of <a href="https://www.earth.com/news/hubble-detects-awe-inspiring-newborn-star/" target="_blank" rel="noreferrer noopener">star formation</a> relatively recently in its history.



<h3 class="wp-block-heading" id="h-interstellar-medium-nbsp">Interstellar medium&nbsp;</h3>



The galaxy has a high density of gas, which is a prime ingredient for star formation. This gas is mostly in the form of hydrogen.



<h3 class="wp-block-heading" id="h-unusual-characteristics">Unusual characteristics</h3>



Its characteristics are more typical of primordial galaxies found in the early universe, making it a valuable object of study for understanding galaxy formation and evolution.



Ultimately, I Zwicky 18 provides insights into the conditions and processes that might have been prevalent in the early universe.



<h3 class="wp-block-heading" id="h-life-cycles-of-stars-and-dust">Life cycles of stars and dust</h3>



The image was captured as part of a Webb program to study the life cycle of dust in I Zw 18.&nbsp;



“Scientists are now building off of previous research with Hubble obtained at optical wavelengths, studying individual dusty stars in detail with Webb’s equivalent spatial resolution and sensitivity at infrared wavelengths.”&nbsp;



ESA noted that this galaxy is of particular interest as its content of elements heavier than helium is one of the lowest of all known <a href="https://www.earth.com/news/early-galaxy-formation-occurred-much-faster-than-we-thought/" target="_blank" rel="noreferrer noopener">galaxies</a> in the local universe.&nbsp;



“Such conditions are thought to be similar to those in some of the first star-forming galaxies at high redshift, so the Webb study of I Zw 18 should shed light on the life-cycle of stars and dust in the early universe.”



<h2 class="wp-block-heading" id="h-the-constellation-ursa-major">The constellation Ursa Major </h2>



Ursa Major, also known as the Great Bear, is one of the most prominent and easily recognizable constellations in the northern sky. 



Its name, "Ursa Major," means "Great Bear" in Latin, and it has been a significant part of various mythologies and star lore across cultures for thousands of years. 



One of the most famous asterisms within Ursa Major is the Big Dipper, a group of seven bright stars that form a shape resembling a ladle or dipper. The Big Dipper is often used as a navigation tool because it points to Polaris, the North Star, located in the nearby constellation Ursa Minor.



Ursa Major is best viewed in the northern hemisphere and is circumpolar, meaning it is visible year-round for much of the Northern Hemisphere. Its position changes with the seasons, rotating around Polaris, the North Star.



Image Credit: NASA/ESA/CSA James Webb Space Telescope



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Dwarf galaxy provides a window into the early universe

The MODIS instrument, short for Moderate Resolution Imaging Spectroradiometer, is a key instrument aboard the Terra and Aqua satellites. MODIS is playing a vital role in the development of Earth ecosystem models, able to predict global changes, which then assist policy makers in making informed decisions about the protection of the global environment.

Heavy snow and cloud cover in the Alps are seen in this Image of the day&nbsp;from the <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> and features a look at heavy snow and low clouds in the Alps. Wildlife such as ibex live in the higher peaks to elevations of 3,400 m (11,155 ft), and plants such as Edelweiss grow in rocky areas in lower elevations as well as in higher elevations.

Heavy snow and cloud cover in the Alps

Monitoring Earth Changes with MODIS

Aqua is a NASA scientific research satellite that studies precipitation, evaporation, and water cycles. Terra and Aura make up the Earth Observing System. It's the second component of the system.

A frozen Lake Erie in February Today’s Image of the Day comes from the <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> and features a look at a frozen <a href="https://www.earth.com/image/icy-lake-erie/">Lake Erie</a>, which is currently 93.3 percent iced over. A frozen Lake Erie in February
This false-color image was created using data from the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Aqua satellite to differentiate between snow, ice, and clouds.
Lake Erie /ˈɪəri/ (French: Lac Érié) is the fourth-largest lake (by surface area) of the five Great Lakes in North America, and the eleventh-largest globally if measured in terms of surface area.It is the southernmost, shallowest, and smallest by volume of the Great Lakes and therefore also has the shortest average water residence time. At its deepest point Lake Erie is 210 feet (64 metres) deep. 
Situated on the International Boundary between Canada and the United States, Lake Erie&#8217;s northern shore is the Canadian province of Ontario, specifically the Ontario Peninsula, with the U.S. states of Michigan, Ohio, Pennsylvania, and New York on its western, southern, and eastern shores. These jurisdictions divide the surface area of the lake with water boundaries. 
The lake was named by the Erie people, a Native American people who lived along its southern shore. The tribal name &#8220;erie&#8221; is a shortened form of the Iroquoian word erielhonan, meaning long tail
&#8212;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com/staff">Earth.com</a> Staff Writer
Image Credit: <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a>

A frozen Lake Erie in February

Aqua Earth Observing Satellite

This beautiful photo gallery contains 50 incredible images of Earth from Space. These images were taken by astronauts onboard the International Space Station, as well as by a multitude of NASA satellites orbiting the earth.

Today’s Image of the Day comes thanks to the <a href="https://earthobservatory.nasa.gov/IOTD/view.php?id=90654&amp;eocn=home&amp;eoci=iotd_readmore">NASA Earth Observatory</a> and features a look at Super Typhoon Noru in the Pacific Ocean just south of <a href="https://www.earth.com/news/first-blue-chrysanthemums-created/">Japan</a>.
This image was captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite on July 31, 2017. 
At the time the photo was taken, Typhoon Noru was located just 250 kilometers south of Iwo Jima. Maximum sustained winds hit 150 miles per hour.
The storm briefly became a category 5 on July 30, before being downgraded to a category 4 one day later.
&#8211;
By <a href="mailto:rarnold@earth.com">Rory Arnold</a>, <a href="https://www.earth.com/staff">Earth.com</a> Staff Writer
Source: <a href="https://earthobservatory.nasa.gov/IOTD/view.php?id=90654&amp;eocn=home&amp;eoci=iotd_readmore">NASA Earth Observatory</a>

Super Typhoon Noru in the Pacific Ocean

Incredible Images of Earth from Space

Photos from the International Space Station are found in this awesome Earth.com image gallery. Flat-earthers won't agree, but these incredible photos of the Earth were taken by astronauts onboard the International Space Station. The International Space Station is a modular space station in low Earth orbit.

Northern Italy from the space station is seen here in this Image of the Day from the <a href="http://www.esa.int/">European Space Agency</a> (ESA). The view includes the top half of the Italian Peninsula, along with <a href="https://www.earth.com/image/wildfires-burn-northern-corsica/">Corsica</a> and Sardinia off the coast. This image was captured by ESA astronaut Paolo Nespoli on his third and final mission to the Space Station.

Northern Italy from the Space Station

Photos from the International Space Station

The influence of synthetic plastic on our planet is concerning, to say the least. It's everywhere - from the depths of our oceans to the food we eat, even finding its way into our bodies. But, Avinash Manjula-Basavanna, a seasoned research scientist at Northeastern University, sees "MECHS" as a solution. 



"The kind of impact that human-made materials are making on the living world is resulting in&nbsp;climate change, pollution and more," he says. 



"One of the ways that we are able to address this is to make materials sustainable and also make materials which are smart or intelligent."



<h2 class="wp-block-heading" id="h-birth-of-a-new-bioplastic">Birth of a new bioplastic</h2>



Joining forces with Neel S. Joshi, an associate professor of chemistry and chemical biology at Northeastern, Manjula-Basavanna gave birth to a new bioplastic named MECHS.



It stands for Mechanical Engineered Living Materials with Compostability, Healability, and Scalability.



The team recently showcased their discovery in the journal Nature Communications. Here, they articulated their unique work with engineered living materials, living cells that produce functional <a href="https://www.earth.com/news/plastic-pollution-is-changing-the-entire-earth-system/" target="_blank" rel="noreferrer noopener">materials</a>.



<h2 class="wp-block-heading" id="h-wonders-of-bioplastic">Wonders of bioplastic</h2>



What makes MECHS stand out? Manjula-Basavanna and Joshi gave us two major reasons.



Firstly, MECHS exhibits the beauty of nature-inspired solutions, with the ability to regenerate, regulate themselves, and respond to external stimuli such as light. 



The second reason is even more significant in today's context. Unlike the harmful plastics choking our planet and bodies, MECHS is biodegradable in water and even in a compost bin. 



"Right now we use a lot of conventional nonbiodegradable plastics for applications they don't need to be used in at all," Joshi says. "If we replace that with our <a href="https://www.earth.com/news/major-plastic-pollution-lurks-beneath-the-surface-of-rivers/" target="_blank" rel="noreferrer noopener">plastic</a>, you could just flush it down the toilet and it would biodegrade."



<h2 class="wp-block-heading" id="h-engineered-living-materials">Engineered living materials</h2>



Until now, such engineered living materials haven't been scalable for broad production. Enter MECHS.



Essentially, it's comprised of engineered E. coli bacteria intertwined with a fiber matrix, crafted into a paper- or film-like material. 



The fibrous structure gives MECHS some desirable properties. For instance, the bioplastic can stretch like plastic wrap and be genetically engineered for variable stiffness. And, quite fascinatingly, it has self-healing capabilities.



But the real cherry on top? MECHS is fully dissolvable, be it in large amounts of water or a compost bin. It dissolves rapidly, much faster than other existing biodegradable plastics. Plus, it can be mass-produced similarly to paper.



<h2 class="wp-block-heading" id="h-potential-applications">Potential applications</h2>



The scientific marvels envision MECHS as the solution to "primary packaging." This includes the plastic cover protecting your new iPhone or the detergent pods for your appliances. Imagine MECHS wrapped around a pot plant, slowly breaking down and releasing proteins to fertilize the plant!



Addressing the global problem of plastic pollution, Manjula-Basavanna sees a strong potential for MECHS in plastic packaging, which covers almost one-third of the plastic market. 



He observes that such packaging’s lifespan could last a few days to two years, but the petrochemical plastics used can take hundreds of years to biodegrade.



"For such a short lifespan of packaging, the petrochemical plastics that can take hundreds of years to biodegrade are unnecessary in many cases and thus a sustainable alternative like MECHS due to its biodegradability, flushability, and mechanical tunability could be a game changer," says Manjula-Basavanna.



<h2 class="wp-block-heading" id="h-challenges-in-adopting-mechs">Challenges in adopting MECHS</h2>



While MECHS presents a revolutionary solution to the global plastic crisis, adopting this technology on a large scale is not devoid of challenges. One primary concern lies in the genomic stability of the engineered E. coli bacteria used in MECHS. 



Scientists must ensure that the bacteria remain safe and stable under various environmental conditions to avoid unintended consequences. Additionally, transitioning industries reliant on traditional plastics to MECHS involves overcoming significant economic and logistical barriers. 



Production facilities worldwide may need to adopt new techniques and infrastructure to accommodate this novel material, potentially incurring considerable costs in the short term. 



Furthermore, public perception and regulatory hurdles need to be navigated to gain trust and approval for its widespread use.



<h2 class="wp-block-heading" id="h-future-of-sustainable-materials">Future of sustainable materials</h2>



Looking to the future, the innovations around MECHS signal a burgeoning era of sustainable and adaptable materials capable of transforming industries. 



As research into living materials progresses, new possibilities emerge, such as enabling the development of dynamic, adaptable materials for technologies yet to be imagined. 



Building on their success with MECHS, Manjula-Basavanna and Joshi envision an expanding palette of biodegradable materials, each tailored for specific applications ranging from environmental conservation to health care. 



Their work emphasizes collaboration across disciplines - bridging biology, chemistry, and engineering - to advance sustainable solutions.



Ultimately, MECHS is a testament to how embracing nature-inspired innovation can lead to breakthroughs with the power to <a href="https://www.earth.com/news/plastic-on-beaches-is-now-visible-from-space/" target="_blank" rel="noreferrer noopener">reshape our relationship with the materials</a> we use and the environment we inhabit.



The study is published in the journal <a href="https://www.nature.com/articles/s41467-024-53052-4" target="_blank" rel="noreferrer noopener">Nature Communications</a>.



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Nature-inspired solutions: New bioplastic dissolves rapidly in water

The influence of synthetic plastic on our planet is concerning,...

Are we alone in the universe? Does alien life exist in our galaxy and beyond? Today, as technology continues to rapidly advance, the answers to these profound questions are now closer than ever before. 



Astronomers recently devised a new model they're calling the "formula for life." 



The experts hope this tool will calculate the chances of intelligent life existing in our universe and even predict the potential for alien life to emerge in future universes.



<h2 class="wp-block-heading" id="h-next-generation-of-intelligent-life">Next generation of intelligent life </h2>



According to this new calculation model, the likelihood of life beyond our galaxy sits at 27 percent, which may let down the 65 percent of American adults who firmly believe in extraterrestrial life.



Interestingly, the chances of <a href="https://www.earth.com/news/are-aliens-sending-radio-signals-to-each-other/" target="_blank" rel="noreferrer noopener">intelligent life</a> existing within our own Milky Way are even lower -- just 23 percent.



These estimates come from the concerted efforts of researchers at the <a href="https://search.app?link=https%3A%2F%2Fwww.ed.ac.uk%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">University of Edinburgh</a> and the <a href="https://iubtgedu.org/" target="_blank" rel="noreferrer noopener">University of Genevieve</a>. 



The study suggests that star formation and the evolution of large-scale planets might intertwine to quietly "form the next generation of intelligent life."



<h2 class="wp-block-heading" id="h-frank-drake-s-famous-equation">Frank Drake's famous equation</h2>



The <a href="https://en.wikipedia.org/wiki/Drake_equation" target="_blank" rel="noreferrer noopener">Drake Equation is a formula</a> that estimates the number of active, communicative extraterrestrial civilizations in our galaxy. 



<a href="https://en.wikipedia.org/wiki/Frank_Drake" target="_blank" rel="noreferrer noopener">Frank Drake</a> introduced it in 1961 as a way to break down the complex question of alien life into more manageable parts. 



The equation considers factors like the average rate of star formation, the fraction of stars with planetary systems, the number of planets that could support life, and the likelihood of life developing intelligence and technology to communicate across space.



By tweaking the values of these factors, we can explore different possibilities about how common or rare intelligent life might be in the Milky Way. 



It's not about getting an exact number but sparking discussions and guiding research in astronomy and the search for extraterrestrial intelligence (<a href="https://www.seti.org" target="_blank" rel="noreferrer noopener">SETI</a>). 



<h2 class="wp-block-heading" id="h-dark-energy-and-the-potential-for-alien-life">Dark energy and the potential for alien life</h2>



To understand the potential of other life forms, the team devised a theoretical model that leans heavily on the <a href="https://www.earth.com/news/are-humans-only-intelligent-life-milky-way-galaxy-possible-not-likely/" target="_blank" rel="noreferrer noopener">Drake Equation</a>.



The researchers emphasized that their calculations do not suggest a number of intelligent life forms but rather estimate the likelihood of their <a href="https://www.earth.com/news/dark-oxygen-in-the-deep-sea-may-hold-clues-about-alien-life/" target="_blank" rel="noreferrer noopener">existence</a>.



Their estimation process takes into account dark energy, which comprises over two-thirds of the universe and fuels its expansion.



"Understanding dark energy and the impact on our universe is one of the biggest challenges in cosmology and fundamental physics," said lead researcher Dr. Daniele Sorini, affiliated with <a href="https://www.durham.ac.uk" target="_blank" rel="noreferrer noopener">Durham University</a>’s Institute for Computational Cosmology.



<h2 class="wp-block-heading" id="h-potential-for-future-alien-life">Potential for future alien life</h2>



In addition to the probabilities of current extraterrestrial life, the researchers' model also accommodates for alien life forms that don't exist yet but could develop in the future. 



To do this, they calculated the amount of ordinary matter that combined to form stars across the universe's history, stretching back a staggering 13.8 billion years.



It seems the chances of <a href="https://www.earth.com/news/cosmic-connection-aliens-could-make-contact-by-2029/" target="_blank" rel="noreferrer noopener">intelligent life</a> appearing in universes beyond our own also hover at around 27 percent. 



"Surprisingly, we found that even a significantly higher dark energy density would still be compatible with life, suggesting we may not live in the most likely of universes," said Dr. Sorini.



<h2 class="wp-block-heading" id="h-interplay-of-gravity-and-alien-life">Interplay of gravity and alien life</h2>



Another intriguing factor in cosmic life creation is gravity's role. <a href="https://www.earth.com/news/theory-gravity-exists-without-mass-so-dark-matter-does-not-exist/" target="_blank" rel="noreferrer noopener">Gravity influences</a> the formation of stars and galaxies, effectively setting the stage for potential habitats where life could develop.



The extent of gravity's influence in these processes highlights its importance, not just in structural formation, but in setting conditions that could favor the emergence of life. 



Existing research suggests that regions with <a href="https://www.earth.com/news/central-theory-of-quantum-gravity-is-modeled-in-the-laboratory/" target="_blank" rel="noreferrer noopener">optimal gravity balance</a> might support complex planetary systems, paving the way for biological evolution.



As scientists continue to explore the mysteries of the universe, understanding the precise role of gravity will add another layer to our comprehension of life's cosmic potential.



<h2 class="wp-block-heading" id="h-what-happens-next">What happens next?</h2>



Modeling the probability of intelligent life in other universes opens up numerous avenues for future research.



Scientists are now challenged to refine these models further, grounding them in observations and experiments to reach more precise conclusions.



Such work may involve advancing our understanding of <a href="https://www.earth.com/news/new-evidence-suggests-that-dark-energy-comes-from-black-holes/" target="_blank" rel="noreferrer noopener">dark matter and energy</a> -- components of the universe that remain elusive yet crucial to grasping the cosmic puzzle.



This pursuit could bridge the gap between theoretical physics and cosmology, bringing them closer within the realms of empirical science.



<h2 class="wp-block-heading" id="h-from-speculation-to-exploration">From speculation to exploration</h2>



"It will be exciting to employ the model to explore the emergence of life across different universes and see whether some fundamental questions we ask ourselves about our own universe must be reinterpreted," noted study co-author Lucas Lombriser, a professor at the University of Genevieve.



If this research can help us to better understand our own universe and its likelihood for hosting life, it seems we have come a long way from wild speculation to measured investigation into our place in the cosmos.



So, what does this all mean for us? Are we on the brink of making contact with alien life forms? While the research findings might lead some to temper their expectations, the search for extraterrestrial life continues.



In the end, we need to remember that the universe is vast, mind-bogglingly diverse, and still largely unexplored. 



The <a href="https://www.earth.com/news/finding-alien-life-searching-for-color-purple-not-green/" target="_blank" rel="noreferrer noopener">discovery of life beyond Earth</a> -- both as we know it and beyond our current comprehension -- remain a thrilling frontier in scientific exploration.



The study is published in the journal <a href="https://academic.oup.com/mnras/article/535/2/1449/7896079?login=false#493432585" target="_blank" rel="noreferrer noopener">Monthly Notices of the Royal Astronomical Society</a>.



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Chances that intelligent alien life exists are updated by new AI model

Are we alone in the universe? Does alien life exist...

Scientists have recently described a new species of hermit crab that is sure to capture the fascination of both the scientific community and the general public.



Strigopagurus fragarchela, or Strawberry Claws as it is fondly known, is a large hermit crab species that sports a distinctive crimson hue on the tips of its claws and waling legs. Named after its vibrant, red appendages, the crab looks as if it got caught red-handed - or rather red-clawed - in a strawberry patch.



The scientific title of this new hermit crab <a href="https://www.earth.com/news/why-did-billions-of-crabs-vanish-from-the-bering-sea/" target="_blank" rel="noreferrer noopener">species</a> is a clever blend of the Latin form of "strawberry" (fragaria) and "chela." The name highlights a unique feature of this creature - its bright red claws and walking legs.



<h2 class="wp-block-heading" id="h-uncovering-the-hermit-crab">Uncovering the hermit crab</h2>



Peter Davie, an Honorary at <a href="https://www.museum.qld.gov.au" target="_blank" rel="noreferrer noopener">Queensland Museum</a>, and Dr. Marissa McNamara, the Collection Manager, are the scientists behind the discovery of this unique species of crab.



They found it lurking in relatively deep waters, around 120-260 meters below the surface, off the coast of south-eastern Queensland. And, in recognition of its distinct appearance, it has been given the common name "strawberry-clawed hermit."



According to Dr. McNamara, Strawberry Claws' distinctiveness doesn't end with its vibrant color.



She noted that the strawberry-clawed hermit possesses a unique method of producing underwater sound, something called stridulation, which is akin to the natural music that cicadas play above water.



<h2 class="wp-block-heading" id="h-hermit-crabs-of-australia">Hermit crabs of Australia </h2>



The experts knew instantly, upon discovering the <a href="https://www.earth.com/news/billions-of-snow-crabs-vanished-due-to-rising-ocean-temperatures/" target="_blank" rel="noreferrer noopener">crab</a>, that they were on to something special. The identification of Strigopagurus fragarchela brings an exciting addition to its genus. 



Australia seems to be the stronghold for this family of hermit crabs. The land down under boasts four endemic species, and among these, two species are exclusively found in Queensland.



There is still much to learn about these unique hermit crabs. Most of their ecology remains a mystery, as they have only been collected in trawler catches.



However, the crabs undoubtedly play a crucial role in enriching the biological diversity of the continental shelf communities off south-eastern Queensland.



<h2 class="wp-block-heading" id="h-insight-into-hermit-crab-behavior">Insight into hermit crab behavior</h2>



The behavior of hermit <a href="https://www.earth.com/news/mystery-mollusk-glowing-sea-slug-found-in-the-deep-sea/" target="_blank" rel="noreferrer noopener">crabs</a> such as Strawberry Claws provides a rich avenue for scientific inquiry. Hermit crabs do not create their shells but instead repurpose shells discarded by gastropods.



This behavior not only highlights their resourcefulness but also their role in the ecosystem in recycling valuable calcium carbonate material. 



Recent observations indicate that strawberry-clawed hermits are particularly discerning when choosing their homes, often selecting shells that complement and enhance their striking appearance.



This preference suggests a sophisticated level of decision-making that could offer insights into the cognitive abilities of these crustaceans and make them valuable subjects in behavioral studies.



<h2 class="wp-block-heading" id="h-conservation-and-future-studies">Conservation and future studies</h2>



With the discovery of Strigopagurus fragarchela, attention turns to its conservation status and what measures might be needed to ensure its survival.



The influence of deep-sea fishing and potential climate change impacts on this species are currently unknown. 



Future studies are essential to develop a deeper understanding of their habitat requirements, ecology and life cycle. Collaboration between marine biologists, ecologists, and conservationists is crucial to formulating strategies that can protect these fascinating creatures. 



By preserving their environment, we not only safeguard Strawberry Claws but also contribute to the health of marine ecosystems as a whole. This new discovery serves as a catalyst for continued exploration and conservation in the vast, largely unexplored underwater worlds of Australia.



<h2 class="wp-block-heading" id="h-untapped-mysteries-of-the-ocean">Untapped mysteries of the ocean</h2>



Queensland Museum CEO, Dr. Jim Thompson, has expressed high praise for the contributions of Peter Davie and Dr. Marissa McNamara. They made use of museum specimens of other Strigopagurus hermit crabs to support the identification of the new species.



"Our natural history collections are more than just preserved specimens - they are vital tools for&nbsp;<a href="https://phys.org/tags/scientific+discovery/">scientific discovery</a>, conservation and public education," Dr. Thompson said.



"The work of the scientists and researchers at Queensland Museum helps in providing a record of our state's biodiversity for future generations."



The discovery of the strawberry-clawed hermit crab is a fascinating reminder of the <a href="https://www.earth.com/news/ocean-life-100-new-sea-creatures-found-in-chile/" target="_blank" rel="noreferrer noopener">untapped mysteries</a> our oceans hold.



We need to celebrate these curious and vital components of our rich biodiversity as we continue to explore the wonders of our natural world. After all, who knows what else is waiting to be discovered?



The study is published in the journal <a href="https://www.museum.qld.gov.au/collections-and-research/memoirs/nature-65/mqm-n65-7-davie-mcnamara" target="_blank" rel="noreferrer noopener">Memoirs of the Queensland Museum – Nature</a>.



Image Credit: Queensland Museum 



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Strawberry Claws: The hermit crab that sings underwater

Scientists have recently described a new species of hermit crab...

None of us can live without freshwater. It is, arguably, the most crucial natural resource we have. 



But recent findings have set off alarm bells around the world. Scientists are gravely concerned. Once abundant, our global freshwater levels are now at serious risk.



<h2 class="wp-block-heading" id="h-earth-s-total-freshwater-levels">Earth's total freshwater levels</h2>



An international group of scientists analyzed data from NASA-German satellites and discovered that Earth's total freshwater levels experienced a sudden drop beginning in May 2014, with no signs of recovery since.



The researchers propose that this decline might indicate that Earth's continents have shifted into an enduringly <a href="https://www.earth.com/news/hotter-drier-deadlier-how-much-can-forests-tolerate/" target="_blank" rel="noreferrer noopener">drier state</a>.



Matthew Rodell is a hydrologist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.



“The average amount of freshwater stored on land - that includes liquid surface water like lakes and rivers, plus water in aquifers underground - was 290 cubic miles (1,200 cubic km) lower than the average levels from 2002 through 2014,” said Rodell. 



"That’s two and a half times the volume of Lake Erie lost.”



<h2 class="wp-block-heading" id="h-satellite-data-exposed-water-loss">Satellite data exposed water loss</h2>



The team used observations from the Gravity Recovery and Climate Experiment (GRACE) satellites, a joint effort by NASA and the German Aerospace Center, to identify this significant global decrease in freshwater. 



The GRACE satellites, which operated from 2002 to 2017, measured changes in Earth's gravity monthly, unveiling the shifts in water mass on and beneath the surface. The mission was succeeded by the GRACE–Follow On (GRACE–FO) satellites, which have been operational since May 2018. 



These satellites revealed that the drop in freshwater began with a <a href="https://www.earth.com/image/severe-drought-in-portugal-has-left-reservoirs-at-extreme-lows/" target="_blank" rel="noreferrer noopener">severe drought</a> in northern and central Brazil, quickly followed by major droughts in Australasia, South America, North America, Europe, and Africa. 



Warmer <a href="https://www.earth.com/news/ocean-temperatures-were-a-driving-force-behind-2023s-record-heat/" target="_blank" rel="noreferrer noopener">ocean temperatures</a> in the tropical Pacific during the 2014–2016 El Niño, one of the most intense since 1950, played a critical role in shifting atmospheric jet streams and altering global weather and rainfall patterns.



<h2 class="wp-block-heading" id="h-freshwater-levels-did-not-rebound">Freshwater levels did not rebound </h2>



However, the most troubling finding came after the El Niño event subsided: global freshwater levels did not rebound. Rodell noted that 13 of the world’s 30 most intense droughts observed by GRACE occurred since January 2015. 



This pattern raises concerns about whether global warming could be contributing to the sustained freshwater depletion. 



“Warming temperatures increase both the evaporation of water from the surface to the atmosphere and the water-holding capacity of the atmosphere, increasing the frequency and intensity of drought conditions,” said NASA meteorologist Michael Bosilovich.



<h2 class="wp-block-heading" id="h-freshwater-decline-and-global-warming">Freshwater decline and global warming</h2>



The relationship between global warming and freshwater loss becomes clearer when considering the impact of <a href="https://www.earth.com/news/ai-predicts-global-warmings-impact-on-extreme-weather/" target="_blank" rel="noreferrer noopener">extreme weather</a>. 



“Global warming leads the atmosphere to hold more water vapor, which results in more extreme precipitation,” Bosilovich explained. 



Although annual rain and snowfall totals may not change significantly, the time between these intense precipitation events can grow, causing the soil to dry out and become compact. 



“The problem when you have extreme precipitation is the water ends up running off,” Bosilovich added, meaning it doesn’t soak into the ground and replenish critical groundwater reserves.



This vicious cycle poses significant threats to agriculture, communities, and global stability. During prolonged droughts, the strain on water supplies forces cities and farms to rely heavily on groundwater, creating a loop of unsustainable extraction. 



The resulting depletion impacts farmers and communities, exacerbating poverty, health risks, and potential conflicts. 



A 2024 UN report on water stress highlights that people facing severe <a href="https://www.earth.com/news/global-drought-has-caused-crisis-levels-of-food-and-water-scarcity/" target="_blank" rel="noreferrer noopener">water shortages</a> may resort to contaminated water sources, increasing the risk of disease and famine.



<h2 class="wp-block-heading" id="h-the-future-of-our-water-resources">The future of our water resources</h2>



While scientists suspect global warming plays a significant role in these shifts, definitive links remain complex due to uncertainties in climate predictions and models. 



Susanna Werth, a hydrologist and remote sensing scientist at Virginia Tech who was not involved in the study, noted: “There are uncertainties in climate predictions. Measurements and models always come with errors.” 



This complexity highlights the challenge of forecasting future freshwater trends.



The pressing question remains: will global freshwater levels recover, stabilize, or continue to decline? 



Nine of the warmest years in recorded history coincided with this sharp drop in freshwater. “We don’t think this is a coincidence, and it could be a harbinger of what’s to come," said Rodell.



The data emphasizes the urgent need for action and adaptation strategies as we face a potentially drier future.



The study is published in the journal <a href="https://link.springer.com/article/10.1007/s10712-024-09860-w" target="_blank" rel="noreferrer noopener">Surveys in Geophysics</a>.



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Satellites reveal a sudden drop in global freshwater levels

None of us can live without freshwater. It is, arguably,...

While space is often thought of as a quiet, eerie place of stillness, a dramatic saga is unfolding on the outskirts of our Milky Way galaxy. NASA’s Hubble Space Telescope is serving as an eyewitness to this interstellar drama.



The protagonist of this tale? None other than the Large Magellanic Cloud (LMC), one of our closest galactic neighbors.



<h2 class="wp-block-heading" id="h-a-brush-with-the-milky-way">A brush with the Milky Way</h2>



Even though it is classified as a dwarf <a href="https://www.earth.com/news/runaway-star-j1249-36-spotted-trying-to-escape-our-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">galaxy</a>, the LMC steals the show on the canvas of the southern night sky, where it displays its majestic halo at an impressive 20 times the size of the full moon's diameter.



Some astrophysicists propose that the LMC isn't orbiting around our galaxy. but is rather simply on a drive-by through our cosmic neighborhood.



These same scientists believe that the LMC has recently completed its tightest brush with the Milky Way. This intimate rendezvous has whipped away much of the gaseous <a href="https://www.earth.com/news/breathtaking-photo-shows-an-ice-halo-forming-around-the-sun/" target="_blank" rel="noreferrer noopener">halo</a> that the LMC once wore with pride.



<h2 class="wp-block-heading" id="h-measuring-the-lmc-s-halo">Measuring the LMC's halo</h2>



In a significant milestone, astronomers have managed to measure this halo for the first time based on observations from Hubble.



The findings, which are slated for publication in The Astrophysical Journal Letters, unveil the LMC's halo as surprisingly small - a mere 50,000 light-years across.



This makes it about ten times smaller than the halos of other galaxies of a similar mass. The compactness of this halo is a silent reflection of the LMC’s recent encounter with the Milky Way.



"The LMC is a survivor. Even though it's lost a lot of its gas, it's got enough left to keep forming new <a href="https://www.earth.com/news/uma3-u1-faintest-star-system-found-orbiting-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">stars</a>," explained Andrew Fox, the principal investigator from the European Space Agency in Baltimore, based out of the revered AURA/STScI.



Fox notes that smaller galaxies wouldn't fare as well as the LMC. Without gas, they would just be clusters of aging red stars.



<h2 class="wp-block-heading" id="h-the-milky-way-s-giant-hair-dryer">The Milky Way's "giant hair dryer"</h2>



Despite experiencing a cosmic beatdown, the LMC managed to maintain a compact stub of its erstwhile halo, a feat it could not have pulled off had it been less massive.



The <a href="https://www.earth.com/news/starburst-spikes-seen-exploding-from-nebula-n79-are-1630-light-years-long/" target="_blank" rel="noreferrer noopener">LMC</a>, while only 10% of the mass of the Milky Way, is still chunkier than most dwarf galaxies.



Sapna Mishra, the lead author of the study, argues that the Milky Way’s own gigantic halo truncates or quenches the LMC’s gas supply. Yet even while engaging in this catastrophic dance with the Milky Way, the LMC retains 10% of its halo, thanks to its notable mass.



Most of the LMC's halo was stripped away due to a fascinating phenomenon known as ram-pressure stripping. The dense atmosphere of the Milky Way repels the incoming LMC, creating a wake of gas following the dwarf galaxy - much like the tail of a comet.



"I like to think of the Milky Way as this giant hairdryer, and it's blowing gas off the LMC as it comes into us," noted Fox. He explained that the Milky Way pushed back so violently that the ram pressure stripped away most of the LMC's original halo mass.



<h2 class="wp-block-heading" id="h-future-studies-of-the-large-magellanic-cloud">Future studies of the Large Magellanic Cloud</h2>



Due to its mass and proximity to the Milky Way, the Large Magellanic Cloud presents us with a unique astrophysics laboratory. It allows scientists to understand galactic dynamics in the earlier eras of the universe when galaxies were in closer quarters.



It's also a reminder that the galaxy interaction process is not as clean-cut and simple as we might imagine, but rather a wild, chaotic dance of cosmic forces.



As for the future, the research team is set to investigate the front side of the LMC's halo, a region hitherto unexplored.



Scott Lucchini, a co-author of the study from the <a href="https://www.cfa.harvard.edu/" target="_blank" rel="noreferrer noopener">Center for Astrophysics | Harvard &amp; Smithsonian,</a> points out the next objective.



"In this new program, we are going to probe five sightlines in the region where the LMC's halo and the <a href="https://www.earth.com/news/milky-way-galaxy-is-surrounded-by-massive-magnetic-fields/" target="_blank" rel="noreferrer noopener">Milky Way's halo</a> are colliding. This is the location where the halos are compressed, like two balloons pushing against each other."



The study is published in <a href="https://arxiv.org/abs/2410.11960v1" target="_blank" rel="noreferrer noopener">The Astrophysical Journal</a>.



Image Credit: NASA, ESA, Ralf Crawford (STScI)



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What happened when a dwarf galaxy clashed with the Milky Way?

While space is often thought of as a quiet, eerie...

Black holes lie at the heart of an extraordinary cosmic event that is currently unfolding. With the help of NASA's Neil Gehrels Swift Observatory, scientists have detected a peculiar phenomenon involving a pair of what they refer to as "monster" black holes.



"It’s a very weird event, called AT 2021hdr, that keeps recurring every few months," explained Lorena Hernández-García, an astrophysicist at the Millennium Institute of Astrophysics, the Millennium Nucleus on Transversal Research and Technology to Explore Supermassive Black Holes, and the University of Valparaíso in Chile.



This cosmic spectacle is believed to involve the two monstrous black holes engulfing an unsuspecting gas cloud. As these massive bodies orbit each other, their gravitational forces interact with the cloud, stirring and consuming its gas.



This process creates an oscillating pattern of light emissions that scientists have been observing for months during the dramatic and recurring cosmic performances.



<h2 class="wp-block-heading" id="h-the-dance-of-the-monster-black-holes">The dance of the monster black holes</h2>



The monster black holes reside deep within a galaxy known as 2MASX J21240027+3409114. This celestial neighborhood is nestled about 1 billion light-years away in the northern constellation Cygnus.



Trapped in their eternal celestial dance, the black holes are separated by around 16 billion miles, a distance close enough for light to travel between them within a day. 



These <a href="https://www.earth.com/news/monster-black-hole-is-spinning-in-the-nearby-galaxy-m87-study-confurms/" target="_blank" rel="noreferrer noopener">cosmic giants</a> together have a mass 40 million times that of our own sun. The researchers have determined that these black holes complete a single orbit every 130 days.



Looking into the far future, by about 70,000 years to be precise, the scientists predict a grand finale when these twin behemoths finally collide and merge.



<h2 class="wp-block-heading" id="h-mysterious-recurring-outbursts">Mysterious recurring outbursts</h2>



The journey to uncovering AT 2021hdr began in March 2021, when the Caltech-led ZTF (Zwicky Transient Facility) at the Palomar Observatory in California identified it as an unusual source. 



The event was quickly flagged by ALeRCE (Automatic Learning for the Rapid Classification of Events), a collaborative team that integrates artificial intelligence with human analysis to sift through extensive survey data and highlight significant night sky phenomena for the astronomical community.



With initial ideas attributing the flare to a <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernova</a>, the recurring nature of the outbursts prompted a shift in hypotheses. Since the first flare, the event has consistently produced outbursts, roughly every 60 to 90 days.



Study co-author Alejandra Muñoz-Arancibia is an ALeRCE team member and astrophysicist at the Millennium Institute of Astrophysics and the Center for Mathematical Modeling at the <a href="https://uchile.cl/" target="_blank" rel="noreferrer noopener">University of Chile</a>.



“Although this flare was originally thought to be a supernova, outbursts in 2022 made us think of other explanations,” said Muñoz-Arancibia. “Each subsequent event has helped us refine our model of what’s going on in the system.”



<h2 class="wp-block-heading" id="h-monster-black-holes-devour-a-gas-cloud">Monster black holes devour a gas cloud</h2>



The researchers left no stone unturned in their quest to unravel this cosmic mystery. Their efforts rewarded them with a revelation: the <a href="https://www.earth.com/news/supermassive-binary-black-holes-secrets-revealed/" target="_blank" rel="noreferrer noopener">binary system</a> produces oscillations in ultraviolet and X-ray light on the same time scales as ZTF observes in the visible range.



Through a process of elimination, the experts first dismissed the possibility of regular activity in the galactic center being the cause. Next, they eliminated the chance of a star wandering too close to the black holes and being ripped apart. 



Eventually, the scientists settled on the theory of a gas cloud, much larger than the binary itself, meeting its fate at the hands of the twin black holes. As the cloud approached the black holes, <a href="https://www.earth.com/news/theory-gravity-exists-without-mass-so-dark-matter-does-not-exist/" target="_blank" rel="noreferrer noopener">gravity</a> tore it apart, forming filaments around the pair, and the ensuing friction started to heat it.



As the gas cloud got denser and hotter near the black holes, the complex interplay of forces spewed out some of the gas with each rotation - causing the fluctuations in light that Swift and ZTF have been observing.



<h2 class="wp-block-heading" id="h-unveiling-the-grandeur-of-the-universe">Unveiling the grandeur of the universe </h2>



Looking ahead, the scientists plan to continue their observations of AT 2021hdr. They anticipate further insights into the system and aim to hone their models. 



In particular, the scientists are interested in studying the host galaxy of AT 2021hdr, which is currently merging with another nearby galaxy – a phenomenon that they were the first to report.



Reflecting on the mission, S. Bradley Cenko, Swift’s principal investigator at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, expresses his pride and awe at the discoveries that Swift continues to enable as it approaches its 20th anniversary. 



"There’s still so much it has left to teach us about our ever-changing cosmos," said Cenko.



Through this venture, NASA continues its commitment to unveiling the grandeur of our universe and deciphering its many mysteries. 



Its missions are an integral part of an expanding, global network that observes the sky unceasingly to unravel <a href="https://www.earth.com/news/study-dark-matter-does-not-exist-and-the-universe-is-27-billion-years-old/" target="_blank" rel="noreferrer noopener">how the universe works</a>.



The study is published in the journal <a href="https://doi.org/10.1051/0004-6361/202451305">Astronomy and Astrophysics.</a>



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Monster black holes are trapped in an eternal dance

Black holes lie at the heart of an extraordinary cosmic...

In our united struggle against the threat of global warming, progress appears stagnant. While Britain boldly abandons the era of fossil fuels, the world faces the relentless surge of CO2 emissions.



Indeed, Britain's closure of its last coal-burning power station marks a victory, but can it counterbalance the alarming prediction of 41.2 billion tons of CO2 that our atmosphere is expected to house by 2024?



<h2 class="wp-block-heading" id="h-global-co2-emissions">Global CO2 emissions</h2>



The recently held Conference of the Parties (COP29) in Baku, Azerbaijan, allowed prominent leaders such as PM Keir Starmer to declare their commitment towards reducing greenhouse gases.



Concurrently, the conference highlighted the ominous worldwide forecast of <a href="https://www.earth.com/news/met-office-2024-co2-levels-will-surpass-the-point-of-no-return/" target="_blank" rel="noreferrer noopener">CO2</a> emissions resultant of fossil fuel combustion.



Discussions at COP29 highlighted the urgency for countries to adopt stronger climate policies and phase out fossil fuels. However, global dependence on these energy sources persists, despite a growing transition to cleaner alternatives. 



The conference revealed a critical gap between current actions and the scale of changes needed to avoid the most severe impacts of climate change​​​​.



<h2 class="wp-block-heading" id="h-fossil-fuels-and-their-dirty-side">Fossil fuels and their "dirty" side</h2>



The trifecta of fossil fuels - coal, oil, and gas - take center stage in the carbon emissions debacle. 



Despite these fuels' role in quenching our insatiable energy appetite, the environmental repercussions are distressing. According to recent research, coal ranks as the main culprit, accounting for a 41% share, followed by oil (32%) and gas (21%).



The research study, lead by Pierre Friedlingstein alongside a 120-scientist team from Exeter's <a href="https://www.exeter.ac.uk/research/institutes/gsi/" target="_blank" rel="noreferrer noopener">Global Systems Institute</a>, yet again spotlights the "increasingly dramatic" <a href="https://www.earth.com/news/plants-absorb-31-more-co2-than-previously-estimated/" target="_blank" rel="noreferrer noopener">effects of global warming</a>.



<h2 class="wp-block-heading" id="h-bird-s-eye-view-of-co2-emissions">Bird's eye view of CO2 emissions</h2>



The geographic distribution of carbon emissions is also concerning. China tops the emissions chart with 12 billion tonnes (13.2 billion U.S. tons) of CO2, which equals a hefty 32% of the global total.



The United States and India trail with contributions of 13% and 8%, respectively, and the EU contributes an additional 7%. This leaves about 38% of <a href="https://www.earth.com/news/atmospheric-co2-could-push-temperatures-much-higher-than-expected/" target="_blank" rel="noreferrer noopener">emission</a> shares spread across various other nations.



While fossil fuels remain under scrutiny, another significant contributor to CO2 emissions is land use change, such as deforestation.



Predictions for 2024 suggest an added 4.2 billion tonnes (4.6 billion U.S. tons) of CO2 to our atmosphere from land use changes alone. 



<h2 class="wp-block-heading" id="h-renewable-energy-revolution">Renewable energy revolution</h2>



Despite the gloomy picture painted by these numbers, a ray of hope breaks through the clouds. An increasing shift towards renewable energy sources like solar, biomass, and geothermal, signals a potential for change. 



Britain's successful transition from coal sets a precedent, but will the world follow this lead?



With global CO2 emissions on the rise, innovation and technology offer critical weapons in our climate change battle. 



Carbon capture and storage (CCS) techniques, for example, could potentially cut industrial emissions by up to 90%.



Additionally, breakthroughs in smart grids and energy efficiency could aid in reducing global emissions further. These developments underscore the need for continued research and innovation in clean energy solutions.



<h2 class="wp-block-heading" id="h-education-and-policy-reform">Education and policy reform</h2>



The transition journey to a low-carbon future is multifaceted, demanding an equally diverse response. 



Education and policy reforms, combined with technological advancements, are the thrust propelling us towards a sustainable future. 



Knowledge dissemination can generate global awareness and help to create a new generation committed to sustainable living. Likewise, effective policy can trigger tangible changes in our energy consumption habits.



<h2 class="wp-block-heading" id="h-rapid-cuts-to-fossil-fuels">Rapid cuts to fossil fuels</h2>



Our progress to date is noteworthy, but we've got a long road ahead in the <a href="https://www.earth.com/news/rising-co2-will-cause-rapid-climate-change-in-the-tropical-andes/" target="_blank" rel="noreferrer noopener">carbon emissions</a> fight. A global embrace of renewable energy technologies is crucial to achieve the Paris Agreement goals. 



A plateau in emissions growth over the past decade shows modest progress compared to previous trends, but it is far from the deep reductions needed to meet the Paris Agreement goals. 



We need sharp, immediate reductions in fossil fuel usage to keep the global average temperature rise under 2°C, and ideally 1.5°C. With every passing second, the urgency to combat the dangers of CO2 emissions escalates.



Current projections indicate that warming will exceed the 1.5°C target within six years unless emissions are drastically reduced.



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Global CO2 emissions rise as nations tackle fossil fuel dependence

In our united struggle against the threat of global warming,...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nushagak Bay in southwest Alaska

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Lake Trasimeno in Central Italy

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Detecting mercury contamination with the tap of a finger

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Kainji Lake in north central Nigeria

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...