<p>Today's <strong>Image of the Day</strong> from the European Space Agency features the barred spiral galaxy NGC 1559, located around 35 million light-years away in the southern constellation Reticulum. The image was captured by the James Webb Space Telescope. </p>



<h2 class="wp-block-heading" id="h-fuel-for-star-formation">Fuel for star formation </h2>



<p>"The data featured in this portrait make use of two of Webb’s instruments: the Mid-InfraRed Instrument (MIRI) and Near-InfraRed Camera (NIRCam)," noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.</p>



<p>"Here MIRI captures the glow of interstellar dust grains, which trace out the interstellar medium, the fuel for future star formation. NIRCam shows the light from stars, even young stars hidden behind prodigious amounts of dust. NIRCam also captures emission from ionised nebulae around young stars."</p>



<h2 class="wp-block-heading" id="h-webb-reveals-galaxies-in-new-light">Webb reveals galaxies in new light</h2>



<p>According to ESA, the data was collected by the <a href="https://sites.google.com/view/phangs/home">PHANGS team</a> as part of a program in which Webb will observe 55 <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/">galaxies</a> that have also been mapped by the Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope, the Hubble Space Telescope, and more.&nbsp;</p>



<p>"By combining Webb’s unprecedented view of the dust and stars with data from these other facilities, the team aims to obtain a new, highly detailed view of how stars are born, live, and die in galaxies across the Universe."</p>



<h2 class="wp-block-heading" id="h-ngc-1559-a-loner-in-space">NGC 1559: A loner in space</h2>



<p>Although NGC 1559 appears to sit close to one of our nearest neighbors in the sky - the Large Magellanic Cloud (LMC) - this is just a trick of perspective, noted ESA.</p>



<p>While it is part of the Reticulum constellation, NGC 1559 is not part of the Local Group of galaxies but instead resides in a more distant region of space.</p>



<p>"In reality, NGC 1559 is physically nowhere near the LMC in space; in fact it truly is a loner, lacking the company of any nearby galaxies or membership of any galaxy cluster."</p>



<h2 class="wp-block-heading" id="h-star-formation-in-ngc-1559">Star formation in NGC 1559</h2>



<p>NGC 1559 is notable for its active star formation and strong magnetic fields. It has also been the site of several <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, making it of particular interest to astronomers studying stellar evolution and the lifecycle of stars.</p>



<p>The structure of NGC 1559 includes well-defined spiral arms that are rich in young, hot stars and regions of ionized gas, indicative of ongoing <a href="https://www.earth.com/news/black-hole-is-starving-its-host-galaxy-of-star-forming-fuel/" target="_blank" rel="noreferrer noopener">star formation</a>.</p>



<p>The galaxy’s central bar is believed to play a role in driving gas towards the core, fueling both the star formation and the activity around its nucleus.</p>



<h2 class="wp-block-heading" id="h-an-extragalactic-wonder">An extragalactic wonder</h2>



<p>Despite being relatively small compared to larger galaxies like the Milky Way, NGC 1559 is an important object for understanding how barred spiral galaxies evolve and the processes that trigger supernovae.</p>



<p>The galaxy’s remote location and active nature make it a fascinating subject of study in the field of extragalactic astronomy. The isolation of NGC 1559 allows for a clearer view of its structure without much interference from neighboring galaxies.</p>



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



<p>Barred spiral galaxies are a type of spiral galaxy characterized by a central bar-shaped structure composed of stars. This bar extends out from the core and connects to the galaxy's spiral arms, which swirl outward in a graceful pattern.</p>



<p>Scientists believe that the bar plays a crucial role in the evolution of the galaxy, funneling gas towards the core and potentially triggering star formation or feeding a central black hole. </p>



<p>The <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">Milky Way</a>, our own galaxy, is an example of a barred spiral. These galaxies are quite common in the universe, making up about two-thirds of all observed spiral galaxies.</p>



<p>The bar itself is thought to be a temporary feature, developing as the galaxy matures and possibly disappearing over time as the dynamics of the stars change. </p>



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



<p>The Reticulum constellation is a small, faint constellation in the southern sky. Its name means "the reticle" in Latin, which refers to the crosshairs in an eyepiece of a telescope. </p>



<p>The constellation was named in the 18th century by the French astronomer Nicolas Louis de Lacaille to honor the reticle he used in his scientific instruments. It is one of the 88 modern constellations recognized by the International Astronomical Union.</p>



<p>Image Credit: ESA/Webb, NASA &amp; CSA, A. Leroy, J. Lee and the PHANGS Team</p>



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Spiral galaxy NGC 1559 is a loner in outer space

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

<p>Today's <strong>Image of the Day</strong> from the European Space Agency features the barred spiral galaxy NGC 3783, which is located about 130 million light-years away in the constellation Centaurus. </p>



<p>NGC 3783 is also the most prominent of a galaxy group (by the same name) that contains 47 galaxies. </p>



<h2 class="wp-block-heading" id="h-galaxy-groups">Galaxy groups</h2>



<p>“Like galaxy clusters, galaxy groups are aggregates of gravitationally bound galaxies. Galaxy groups, however, are less massive and contain fewer members than <a href="https://www.earth.com/news/titanic-galaxy-cluster-collision-defies-all-current-understanding-of-the-universe/" target="_blank" rel="noreferrer noopener">galaxy clusters</a> do: where galaxy clusters can contain hundreds or even thousands of constituent galaxies, galaxy groups do not typically include more than 50,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.</p>



<p>“The Milky Way is actually part of a galaxy group, known as the Local Group, which contains two other large galaxies (Andromeda and the Triangulum galaxy), as well as several dozen satellite and dwarf galaxies.”</p>



<h2 class="wp-block-heading" id="h-hd-101274-a-blue-giant-star">HD 101274: A blue giant star</h2>



<p>The bright object that appears to the right of the galaxy is the star HD 101274. “The perspective in this image makes the star and the galaxy look like close companions, but this is an illusion. HD 101274 lies only about 1,530 light-years from Earth, meaning it is about 85 thousand times closer than NGC 3783,” explained ESA.&nbsp;</p>



<p>The star is part of the NGC 3766 cluster, which is sometimes referred to as the Pearl Cluster, an open cluster known for its richness in bright stars and its relatively young age.</p>



<p>HD 101274 is categorized as a blue giant star, characterized by its high temperature and luminosity. </p>



<p>Blue giants are massive stars that have left the main sequence phase of stellar evolution and are burning helium or heavier elements in their cores. These stars are known for their short lifespans relative to smaller stars due to their rapid consumption of nuclear fuel.</p>



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



<p><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> like HD 101274 are important for astronomers because they help in studying the properties of stellar populations in clusters and the dynamics of stellar evolution in different environments. </p>



<p>The spectral and photometric observations of such stars can provide valuable insights into the characteristics of their atmospheres, internal structures, and the processes occurring within and around them.</p>



<h2 class="wp-block-heading" id="h-bright-central-region-of-ngc-3783">Bright central region of NGC 3783</h2>



<p>One of the most interesting aspects of NGC 3783 is that it harbors an active galactic nucleus, meaning its central region is exceptionally luminous, likely due to the presence of a supermassive black hole. This black hole is actively accreting material, which emits a substantial amount of radiation as it spirals inward and heats up.</p>



<p>The galaxy is particularly known for its bright central region and has been studied extensively in the ultraviolet and X-ray light spectra to understand better the properties of the accretion disk around the black hole and the complex dynamics of the material surrounding it. These studies are crucial for understanding the physics of active galactic nuclei and the role they play in <a href="https://www.earth.com/news/galaxies-like-our-own-milky-way-are-not-unique/" target="_blank" rel="noreferrer noopener">galaxy evolution</a>.</p>



<p>According to ESA, NGC 3783 is a&nbsp;Type I Seyfert galaxy. “In this image it is recorded by Hubble in incredible detail, from its glowing central bar to its narrow, winding arms and the dust threaded through them, thanks to five separate images taken in different wavelengths of light," noted ESA.</p>



<p>“In fact, the galactic center is bright enough to Hubble that it exhibits diffraction spikes, normally only seen on stars such as HD 101274.”</p>



<h2 class="wp-block-heading" id="h-more-about-the-ngc-3783-galaxy-group">More about the NGC 3783 galaxy group</h2>



<p>The NGC 3783 group is part of the larger Hydra-Centaurus Supercluster, which itself is a massive collection of <a href="https://www.earth.com/news/shapes-of-one-million-galaxies-hint-at-the-universes-origins/" target="_blank" rel="noreferrer noopener">galaxies</a> and galaxy clusters located primarily in the constellations of Hydra and Centaurus.</p>



<p>The NGC 3783 group consists of several galaxies that are gravitationally bound and interact with each other. These interactions can influence the galaxies' evolution through mechanisms like tidal forces and merger events, which can trigger star formation, fuel central black holes, and reshape the galaxies' structures.</p>



<p>Studying groups like the NGC 3783 group helps astronomers understand how <a href="https://www.earth.com/news/ceers-2112-ancient-galaxy-looks-strikingly-similar-to-ours/" target="_blank" rel="noreferrer noopener">galaxies</a> evolve together in a common gravitational environment, offering insights into the dynamics and evolution of structures on cosmic scales. </p>



<p>Image Credit: ESA/Hubble &amp; NASA</p>



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Luminous galaxy NGC 3783 and a blue giant star

<p>Today's Image of the Day from NASA Earth Observatory features Cyclone Chido, an intense tropical cyclone that caused unprecedented devastation across Southeast Africa in December 2024.</p>



<p>On December 14, Chido struck the islands of Mayotte with wind speeds exceeding 200 km/h (124 mph) and gusts over 225 km/h (140 mph), marking it as the most powerful storm to hit the French territory in at least 90 years.&nbsp;</p>



<p>The <a href="https://www.earth.com/news/fast-moving-tropical-cyclones-are-becoming-more-powerful/" target="_blank" rel="noreferrer noopener">cyclone</a> ultimately made three landfalls - all with winds equivalent to those of a Category 4 tropical cyclone. According to media reports, authorities in Mayotte fear that hundreds and possibly thousands of people have died.</p>



<h2 class="wp-block-heading" id="h-rapid-intensification-of-chido">Rapid intensification of Chido</h2>



<p>“Chido formed in the southeastern Indian Ocean on December 5, 2024. The disturbance rapidly intensified before hitting the Mauritian islands of Agaléga on December 11. The next day, the cyclone peaked in intensity, with sustained winds of about 250 kilometers (155 miles) per hour - equivalent to a strong Category 4 hurricane on the Saffir-Simpson wind scale,” noted <a href="https://earthobservatory.nasa.gov/images/153708/cyclone-chido-pummels-mayotte" target="_blank" rel="noreferrer noopener">NASA</a>.&nbsp;&nbsp;</p>



<p>“According to the Joint Typhoon Warning Center, Cyclone Chido continued to move west in an environment favorable for sustaining storms. That included warm <a href="https://www.earth.com/news/ocean-warming-has-nearly-doubled-in-the-last-decade/" target="_blank" rel="noreferrer noopener">sea surface temperatures</a> of up to 29 degrees Celsius (84 degrees Fahrenheit) and low vertical wind shear.</p>



<h2 class="wp-block-heading" id="h-devastation-of-cyclone-chido-nbsp">Devastation of Cyclone Chido&nbsp;</h2>



<p>The cyclone obliterated entire neighborhoods, particularly in hillside shantytowns inhabited by undocumented migrants. Official reports confirm at least 31 fatalities and thousands of injuries - though the actual death toll may be significantly higher.&nbsp;</p>



<p>The destruction in Mayotte's capital, Mamoudzou, has left approximately 100,000 people homeless. The aftermath has been characterized by a lack of visible assistance from authorities, with residents relying on community support amid concerns over hunger, disease outbreaks, and lawlessness.&nbsp;</p>



<h2 class="wp-block-heading" id="h-landfall-in-mozambique-nbsp">Landfall in Mozambique&nbsp;</h2>



<p>Following its impact on Mayotte, Chido continued westward, making landfall in Mozambique on December 15 near the city of Pemba as a strong Category 4-equivalent intense tropical cyclone.&nbsp;</p>



<p>The storm resulted in at least 34 deaths and 43 injuries across three northern provinces. In neighboring Malawi, Chido claimed two lives.&nbsp;</p>



<p>The cyclone's ferocity, fueled by warmer ocean temperatures attributed to climate change, has raised concerns about the increasing frequency and <a href="https://www.earth.com/news/coastal-hurricanes-are-intensifying-faster-due-to-climate-change/" target="_blank" rel="noreferrer noopener">intensity</a> of such storms in the region.&nbsp;</p>



<h2 class="wp-block-heading" id="h-recovery-efforts-and-vulnerable-communities-nbsp">Recovery efforts and vulnerable communities&nbsp;</h2>



<p>The crisis has highlighted the vulnerabilities of affected regions, particularly Mayotte, which faces challenges of poverty, overcrowding, and inadequate infrastructure.&nbsp;</p>



<p>The lack of preparedness and insufficient emergency response have drawn criticism, highlighting the need for improved disaster management and investment in resilient infrastructure to mitigate the impacts of future climate-induced disasters.&nbsp;</p>



<p>In response to the disaster, French President Emmanuel Macron is scheduled to visit Mayotte, and relief efforts are underway, including the arrival of a ship carrying 180 tons of aid.&nbsp;</p>



<p>However, the scale of destruction and ongoing challenges in delivering assistance to remote and inaccessible areas continue to impede recovery efforts.&nbsp;</p>



<h2 class="wp-block-heading" id="h-climate-fueled-intensification-of-cyclones-nbsp">Climate-fueled intensification of cyclones&nbsp;</h2>



<p>The <a href="https://www.earth.com/news/the-rising-impact-of-tropical-cyclones-in-a-warming-world/" target="_blank" rel="noreferrer noopener">intensification of cyclones</a> due to climate change is a significant and concerning phenomenon. As global temperatures rise, warmer ocean waters provide the energy that fuels tropical cyclones, making them stronger and more destructive.&nbsp;</p>



<p>Higher <a href="https://www.earth.com/news/pacific-ocean-temperatures-highest-in-650-years-greatly-harming-coral-reefs/" target="_blank" rel="noreferrer noopener">sea surface temperatures</a> lead to increased evaporation, which adds more moisture to the atmosphere. This moisture can enhance the rainfall associated with cyclones, increasing the risk of flooding.&nbsp;</p>



<p>Additionally, rising sea levels, driven by the melting of polar ice caps and thermal expansion of seawater, exacerbate storm surge impacts, causing more extensive and severe coastal flooding during cyclonic events.</p>



<p>Changes in atmospheric conditions also play a role. While climate change may not increase the overall frequency of cyclones, it is likely to shift the distribution and intensity of these storms. For instance, studies suggest that a larger proportion of cyclones are reaching the most intense categories.&nbsp;</p>



<p>Furthermore, slower-moving cyclones, a trend linked to weakened steering currents, can linger longer over vulnerable areas, compounding the damage with prolonged heavy rainfall and strong winds.</p>



<p>These changes in cyclone behavior present challenges for disaster preparedness and response. Coastal communities, particularly in low-lying regions, are becoming increasingly vulnerable to the compounded impacts of more powerful storms, highlighting the urgent need for climate mitigation and adaptation strategies.</p>



<p>The image was captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the NOAA-20 satellite, about three hours after the storm made landfall.</p>



<p>Image Credit<strong>: </strong>NASA Earth Observatory&nbsp;</p>



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Cyclone Chido’s path of destruction: A climate wake-up call

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

<p>Today's Image of the Day from NASA Earth Observatory features a 9.5-mile section of Pangong Lake on the western end of the Tibetan Plateau. The image was captured by a crew member onboard the International Space Station. </p>



<p>“In this winter scene, a sheet of cracked ice tops part of the lake,” noted <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>. “On the left side, open water appears blue. Shallow water offshore of a delta, formed by a small, winding river, appears green."</p>



<p>"Parallel lines along the coastlines of bays are visible in the high-resolution version of this image. These lines indicate raised beaches, which formed in the past when lake levels were higher.”</p>



<p>NASA pointed out that several roads cut across the landscape, including one with switchbacks that ascends a steep slope. "These roads facilitate tourist travel from both India and China.”&nbsp;</p>



<h2 class="wp-block-heading" id="h-migratory-birds-at-pangong-lake-nbsp">Migratory birds at Pangong Lake&nbsp;</h2>



<p>Pangong Lake and its surroundings are home to numerous bird species, particularly <a href="https://www.earth.com/news/migratory-birds-burn-unexpected-amounts-of-protein/" target="_blank" rel="noreferrer noopener">migratory birds</a>. Visitors can spot various waterfowl and waders that are rarely seen elsewhere.</p>



<p>“During the summer, species such as bar-headed geese and Brahminy ducks attract bird watchers to the lake, which is a major breeding ground for migrating birds,” said NASA.</p>



<p>Pangong Lake is one of the few places in India where the endangered black-necked crane is found during its breeding season. </p>



<p>Ruddy shelduck and brown-headed <a href="https://www.earth.com/news/gulls-are-shifting-their-habitats-to-urban-areas/" target="_blank" rel="noreferrer noopener">gulls</a> are also frequently spotted around the lake. The ruddy shelduck is known for its striking orange-brown body and creamy white head, while the brown-headed gulls are often seen flying or swimming in the lake.</p>



<h2 class="wp-block-heading" id="h-pangong-lake-nbsp">Pangong Lake&nbsp;</h2>



<p>Pangong Lake is a stunning high-altitude lake situated in the <a href="https://www.earth.com/news/temperatures-are-rising-unexpectedly-fast-on-the-tibetan-plateau/" target="_blank" rel="noreferrer noopener">Himalayas</a>, extending from India to the Tibetan Autonomous Region of China. It is renowned for its mesmerizing beauty and dramatic setting, with the lake lying at an elevation of about 4,350 meters.</p>



<p>One of the most distinctive features of Pangong Lake is its changing colors, ranging from shades of blue to green and even red, influenced by the sky's reflection and the lake's mineral content.</p>



<p>This saline water lake is approximately 134 kilometers long and 5 kilometers wide at its broadest point. Despite its considerable size, Pangong Lake is relatively shallow.&nbsp;</p>



<p>The lake gained additional popularity after being featured in several Indian films - most notably the Bollywood hit "3 Idiots." Its remote location requires a permit for visitors, especially due to its proximity to the Line of Actual Control between India and China.</p>



<p>Despite the geopolitical sensitivities surrounding its location, Pangong Lake remains a favorite among tourists for its unparalleled natural beauty and serene environment.</p>



<h2 class="wp-block-heading" id="h-high-altitude-lakes">High-altitude lakes</h2>



<p>High-altitude lakes are unique bodies of water found at elevations typically above 3,000 meters (about 10,000 feet) in mountain ranges like the <a href="https://www.earth.com/news/himalayan-glaciers-retreating-threat-is-much-worse-than-previously-believed/" target="_blank" rel="noreferrer noopener">Himalayas</a>, Andes, and Rockies. </p>



<p>These lakes are formed either by glacial activity, where glaciers erode the earth to create depressions that fill with melted snow and rainwater, or when natural dams created by landslides or moraines trap water in valleys.</p>



<h3 class="wp-block-heading" id="h-extreme-environments">Extreme environments</h3>



<p>The conditions at high altitudes make these lakes distinct in several ways. The climate is typically colder and harsher, with significant temperature variations between day and night. </p>



<p>This extreme environment affects both the physical characteristics of the <a href="https://www.earth.com/news/alarming-study-most-of-the-worlds-largest-lakes-are-quickly-losing-water/" target="_blank" rel="noreferrer noopener">lakes</a> and the types of ecosystems they support. For example, due to lower atmospheric pressure, the boiling point of water is reduced, which can affect the type of life that can survive in these regions.</p>



<h3 class="wp-block-heading" id="h-critical-habitats">Critical habitats</h3>



<p>Biologically, high-altitude lakes often have limited biodiversity because only certain types of plants and animals can tolerate the cold temperatures and lower oxygen levels in the water. </p>



<p>Despite this, these lakes are crucial habitats for some unique species of fish, birds, and other wildlife. They also serve as important indicators of climate change, as variations in their water levels and temperatures can reflect environmental shifts.</p>



<h3 class="wp-block-heading" id="h-significance-of-high-altitude-lakes">Significance of high-altitude lakes </h3>



<p>Lakes at high altitudes are often clear and pristine, due to the low density of human populations in these areas and minimal industrial activity, making them significant for ecological studies and attractive for tourism. </p>



<p>However, they are sensitive ecosystems, and increased tourist activity brings challenges like pollution and habitat disruption.</p>



<p>High-altitude lakes are not only beautiful and scientifically significant but also hold cultural importance for local communities, often considered sacred and associated with historical and spiritual significance.</p>



<p>Image Credit: NASA Earth Observatory&nbsp;</p>



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Pangong Lake on the Tibetan Plateau

<p>Today's <strong>Image of the Day</strong> 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.</p>



<p>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.</p>



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



<p>"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>.</p>



<p>"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."</p>



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



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



<p>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;</p>



<p>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.&nbsp;</p>



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



<p>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.</p>



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



<p>"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."</p>



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



<p>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.</p>



<p>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.</p>



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



<p>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.</p>



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



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



<p>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.</p>



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



<p>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.</p>



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



<p>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.</p>



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



<p>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. </p>



<p>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.</p>



<p>Image Credit: NASA/ESA/CSA James Webb Space Telescope</p>



<p>-----</p>



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Young, massive stars in the Triangulum Galaxy

<p>The Greenland Ice Sheet, part of which is shown in this image of Jakobshavn Glacier, is now melting at an incredibly rapid pace, pushing sea levels upward while upsetting global weather patterns. </p>



<p>Precise measurements of the ice sheet’s changing shape and volume matter greatly at this point in Earth's history because accurate data helps scientists understand what's coming next.</p>



<p>Until recently, getting this information was tricky. </p>



<p>Now, two advanced missions, ESA’s CryoSat and NASA’s ICESat-2, have joined forces to offer data that reaches far beyond old limits. </p>



<p>Their combined measurements deliver a more complete view that was not possible before.</p>



<h2 class="wp-block-heading" id="h-measuring-greenland-ice-melt">Measuring Greenland ice melt</h2>



<p>As of today, scientists have recorded the first measurements of the Greenland Ice Sheet’s shape changes using both <a href="https://www.esa.int/Applications/Observing_the_Earth/FutureEO/CryoSat" target="_blank" rel="noreferrer noopener">CryoSat</a> and <a href="https://icesat-2.gsfc.nasa.gov/" target="_blank" rel="noreferrer noopener">ICESat-2</a> satellites.</p>



<p>This work is led by researchers from the UK Centre for Polar Observation and Modelling (<a href="https://cpom.org.uk/" target="_blank" rel="noreferrer noopener">CPOM</a>). Lead author and CPOM researcher Nitin Ravinder has confirmed that these missions are able to capture changes in ice elevation with impressive accuracy.</p>



<h2 class="wp-block-heading" id="h-technologies-from-different-skies">Technologies from different skies</h2>



<p>To measure the <a href="https://www.earth.com/news/speed-of-greenland-ice-melt-confirmed-to-be-rapidly-increasing-climate-change/" target="_blank" rel="noreferrer noopener">rapid loss</a> of the ice all across Greenland, one of the mission satellites relies on radar, and the other uses a laser. </p>



<p>Radar can measure through clouds but needs careful adjustments because it can pass into the ice surface before bouncing back.</p>



<p>Laser measurements track the actual surface but cannot see through clouds. </p>



<p>These tools stand at opposite ends, yet when put together, they form a better pair than either could alone. </p>



<p>In fact, a new study published in <em>Geophysical Research Letters</em> notes that CryoSat and ICESat-2 measurements of Greenland Ice Sheet elevation change agree within 3% of what is actually happening.</p>



<p>This stronger confidence means if one mission fails, the other can still <a href="https://www.earth.com/news/greenland-ice-loss-tracked-by-new-gps-system-on-a-daily-basis/" target="_blank" rel="noreferrer noopener">keep track of ice changes</a>.</p>



<p>“We are very excited to have discovered that CryoSat and ICESat-2 are in such close agreement. Their complementary nature provides a strong motivation to combine the data sets to produce improved estimates of ice sheet volume and mass changes," says lead author and CPOM researcher Nitin Ravinder.</p>



<p>"As ice sheet mass loss is a key contributor to global sea level rise, this is incredibly useful for the scientific community and policymakers.”</p>



<div class="wp-block-sendtonews-playerselector">[sendtonews key="23p8n2tdza-4146590-12187" type="single"]</div>



<h2 class="wp-block-heading" id="h-greenland-ice-and-natural-beauty">Greenland, ice, and natural beauty</h2>



<p>Greenland, the world’s largest island, sits between the Arctic and Atlantic Oceans. It is mostly <a href="https://www.earth.com/news/greenland-ice-sheet-discovery-transforms-sea-level-predictions/" target="_blank" rel="noreferrer noopener">covered with thick ice</a>, and its glaciers run from the heart of the island to its shores. </p>



<p>There are small towns along the coastal edges where people make a life that ties closely to the environment. </p>



<p>Long winters and brief summers shape a culture centered on fishing, hunting, and a respect for nature’s power. </p>



<p>The capital, Nuuk, brings together old traditions and new ways of living in a place where weather is a big player in daily life.</p>



<h2 class="wp-block-heading" id="h-melting-ice-and-everyday-lives">Melting ice and everyday lives</h2>



<p>A warming climate makes <a href="https://www.earth.com/news/massive-glacial-outburst-observed-in-greenland-for-the-first-time/" target="_blank" rel="noreferrer noopener">Greenland’s glaciers break apart</a> and slip into the ocean. As they melt, sea levels climb, and coastal cities thousands of miles away face the threat of water creeping up their streets. </p>



<p>Wildlife in Greenland itself struggles when the ice they depend on thins. Polar bears, seals, and walruses have fewer safe spots to rest and hunt. </p>



<p>For local people, the loss of stable ice can disrupt fishing and hunting practices. Shifts in ocean currents triggered by fresh meltwater also <a href="https://www.earth.com/news/greenland-transformation-ice-melt-plant-growth-vegetation-cascading-effects/" target="_blank" rel="noreferrer noopener">change weather patterns</a>, and that can spell trouble for everyone.</p>



<h2 class="wp-block-heading" id="h-real-numbers-behind-greenland-ice-melt">Real numbers behind Greenland ice melt</h2>



<p>Between 2010 and 2023, Greenland’s ice sheet thinned by an average of four feet In the ice sheet’s ablation zone, where summer melting outpaces winter snowfall, the average thinning reached 20 feet. </p>



<p>The worst thinning was at Sermeq Kujalleq, also known as Jakobshavn Isbræ, with a peak thinning of 220 feet. At Zachariae Isstrøm in the northeast, peak thinning hit about 250 feet. </p>



<p>Altogether, the ice sheet shrank by 7,700 cubit feet over a 13-year stretch. It lost more than 1300 cubic feet in 2012 and 2019, matching extreme conditions. </p>



<p>According to the study, these changes affect not only local environments but <a href="https://www.earth.com/news/atmospheric-rivers-are-shifting-with-global-climate-impacts/" target="_blank" rel="noreferrer noopener">global weather patterns</a>.</p>



<p>“CryoSat has provided an invaluable platform for understanding our planet’s ice coverage over the past 14 years, but by aligning our data with ICESat-2, we’ve opened new avenues for precision and insight," says Tommaso Parrinello, CryoSat Mission Manager at <a href="https://www.esa.int" target="_blank" rel="noreferrer noopener">ESA</a>. </p>



<p>"This collaboration represents an exciting step forward, not just in terms of technology but in how we can better serve scientists and policymakers who rely on our data to understand and mitigate climate impacts.” </p>



<h2 class="wp-block-heading" id="h-aligning-with-sister-missions">Aligning with sister missions</h2>



<p><a href="https://earth.esa.int/eogateway/missions/cryosat/cryo2ice" target="_blank" rel="noreferrer noopener">The Cryo2ice campaign</a> that began in 2020 let scientists put CryoSat and ICESat-2 measurements side by side. </p>



<p>By adjusting CryoSat’s orbit, ESA allowed the two satellites to gather radar and laser data over the same areas, almost at the same time. </p>



<p>This set the stage for measuring snow depth from space with a level of accuracy that simply did not exist before.</p>



<p>“It is great to see that the data from ‘sister missions’ are providing a consistent picture of the changes going on in Greenland,” says Thorsten Markus, project scientist for the ICESat-2 mission at <a href="https://www.nasa.gov" target="_blank" rel="noreferrer noopener">NASA</a>.</p>



<p>“Understanding the similarities and differences between radar and lidar ice sheet height measurements allow us to fully exploit the complementary nature of those satellite missions." </p>



<p>Studies like this are critical to put a comprehensive time series of the ICESat, CryoSat-2, ICESat-2, and, in the future, CRISTAL missions together.</p>



<h2 class="wp-block-heading" id="h-greenland-ice-and-earth-s-future">Greenland ice and Earth's future</h2>



<p>The accurate data now available will help in decisions that governments must make soon. Timely, reliable information on ice thickness shifts can guide planning for coastal infrastructure. </p>



<p>It matters to millions of people who live near shores in every corner of the planet, and for those who rely on stable weather patterns to grow food and make a living.</p>



<p>ESA’s CryoSat and NASA’s ICESat-2 work as a team to keep an eye on the ice. Together, they paint a detailed picture of changes in Greenland. </p>



<p>That picture gives experts and leaders better tools for understanding the future and figuring out how to adapt.</p>



<p>The full study was published in the journal <em><a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL110822" target="_blank" rel="noreferrer noopener">Geophysical Research Letters</a>.</em></p>



<p>Video Credit: ESA/Planetary Visions</p>



<p>-----</p>



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Greenland ice sheet seen melting in real-time from Earth orbit

The Greenland Ice Sheet, part of which is shown in...

<p>Life on Earth has faced immense challenges in recent years. The pandemic, heatwaves, and natural disasters remind us how fragile our existence is. These events fuel the argument for seeking a new home in space where humanity might reproduce and thrive.</p>



<p>However, for humans to live and grow on other planets, we must first understand if it’s possible to have children in space. This is a critical question because reproduction is essential for population growth in a new environment.</p>



<p>To address this, scientists are conducting novel experiments involving freeze-dried mouse sperm that is stored aboard the International Space Station (ISS). The results could provide vital insights into the possibility of mammalian reproduction beyond Earth.</p>



<h2 class="wp-block-heading" id="h-frozen-sperm-experiment-in-space">Frozen sperm experiment in space</h2>



<p>Freeze-dried mouse sperm is currently stored on the <a href="https://www.nasa.gov/international-space-station/" target="_blank" rel="noreferrer noopener">ISS</a> in a radiation-protected environment. </p>



<p>In 2025, the samples will return to Earth, where Professor Teruhiko Wakayama from Japan’s <a href="https://www.yamanashi.ac.jp/en/" target="_blank" rel="noreferrer noopener">University of Yamanashi</a> will study them. He aims to determine the impact of the <a href="https://www.earth.com/news/dart-mission-debris-will-create-a-human-made-meteor-shower/" target="_blank" rel="noreferrer noopener">space environment</a> on reproduction and assess whether these samples can create healthy offspring.</p>



<p>Wakayama has ambitious goals. He is developing a device to enable astronauts to conduct rodent in vitro fertilization (IVF) aboard the ISS. This could pave the way for human reproduction in space and may even provide an avenue to safeguard Earth’s genetic diversity.</p>



<p>“Our aim is to establish a system for safely and permanently preserving Earth’s genetic resources somewhere in space – whether on the moon or elsewhere – so that life can be revived even if Earth faces catastrophic destruction,” said Wakayama.</p>



<h2 class="wp-block-heading" id="h-sending-mouse-sperm-to-space">Sending mouse sperm to space</h2>



<p>Wakayama is no stranger to pushing scientific boundaries. In 1997, he co-developed a method to clone the first mouse from adult cells. Since then, he has conducted various studies on reproduction in space.</p>



<p>His team pioneered a freeze-drying method to send mouse sperm to the ISS, where it was stored for six years. Upon its return, the sperm produced healthy baby mice.</p>



<p>The findings revealed that freeze-dried sperm could remain viable for up to 200 years in space. </p>



<p>“That’s absolutely not long enough for our future,” Wakayama admits. He is now testing a new radiation-resistant storage device to extend the viability of reproductive cells indefinitely.</p>



<h2 class="wp-block-heading" id="h-creatures-that-reproduced-in-space">Creatures that reproduced in space</h2>



<p>Scientists have long studied Earthly organisms in space to understand how <a href="https://www.earth.com/news/astronauts-are-surprisingly-good-at-flying-in-space/" target="_blank" rel="noreferrer noopener">microgravity and cosmic radiation</a> affect biological processes. </p>



<p>In 1989, fertilized chicken eggs traveled to space in an experiment nicknamed “Chix in Space.” Frogs and fish have also reproduced in space, though with mixed success. In 2007, a cockroach gave birth to offspring conceived in orbit, though the young displayed some abnormalities.</p>



<p>“We have seen that most of the specific phases of the reproductive cycle can occur in space, at least in a species or two, not always completely successfully. Going to mammals is the next natural step,” explained Virginia Wotring, a professor at the International Space University in France.</p>



<h2 class="wp-block-heading" id="h-challenge-of-sustaining-life">Challenge of sustaining life</h2>



<p>Human reproduction in space faces significant hurdles. Cosmic radiation can damage DNA, increasing the risk of genetic abnormalities in offspring. Microgravity may interfere with embryo development, including critical processes like forming the nervous system and limbs.</p>



<p>“There is other information that we need right now in order to care for the astronauts we’re sending to space now,” said Wotring. Immediate priorities include mitigating the effects of radiation, muscle loss, and weakened immunity.</p>



<p>Despite these challenges, Wakayama believes his work is essential for <a href="https://www.earth.com/news/earth-like-ecosystem-necessary-for-humans-to-live-in-deep-space/" target="_blank" rel="noreferrer noopener">long-term space exploration</a>. He noted that understanding how reproduction works in space could help humans settle on other planets and even bring livestock and pets to sustain life.</p>



<h2 class="wp-block-heading" id="h-possibility-of-reproducing-in-space">Possibility of reproducing in space</h2>



<p>Wakayama’s IVF project has been accepted by Japan’s space agency, and he hopes to launch the necessary device to the ISS within two years. His experiments could reveal whether mammals, including humans, can reproduce and develop normally in space.</p>



<p>“In sci-fi movies, people live on other planets and babies are born, but we don’t even know if that’s possible yet,” said Wakayama. His work aims to answer this fundamental question.</p>



<p>“If we can confirm that, it will bring reassurance. And if it doesn’t work, we need to understand how to address that challenge.”</p>



<h2 class="wp-block-heading" id="h-broader-implications-of-the-research">Broader implications of the research </h2>



<p>Humanity has made strides toward becoming a multi-planetary species. NASA’s <a href="https://www.nasa.gov/humans-in-space/artemis/" target="_blank" rel="noreferrer noopener">Artemis</a> program plans to return astronauts to the Moon in 2026, while SpaceX envisions a crewed mission to Mars in the near future. However, these ambitious plans hinge on <a href="https://www.earth.com/news/astronauts-microbiome-health-is-crucial-to-future-space-exploration/" target="_blank" rel="noreferrer noopener">solving critical issues</a>, including reproduction.</p>



<p>Wakayama’s research represents a vital step in understanding how life can sustain itself in space. Whether his experiments confirm or challenge the possibility of reproduction, they will shape the future of human space exploration.</p>



<p>As we look to the stars, questions about survival and reproduction remind us of the complexities of leaving Earth behind. Whether or not we can thrive in space remains one of humanity’s greatest <a href="https://www.earth.com/news/marss-space-debris-should-be-regarded-as-historical-artifacts/" target="_blank" rel="noreferrer noopener">scientific frontiers</a>.</p>



<p>The study is published in the journal <a href="https://www.science.org/doi/10.1126/sciadv.abg5554"><em>Science Advances</em></a>.</p>



<p>-----</p>



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Frozen sperm can remain viable in space for over 200 years

Life on Earth has faced immense challenges in recent years....

<p>When we talk about the prevention and management of cancer, we don’t usually think that diet changes would be very helpful. But a recent study begs to differ.</p>



<p>The research suggests that dietary changes, such as different types of cooking oils, may play a role in slowing tumor growth in cancer patients.</p>



<p>Experts at UCLA focused on men with early-stage prostate cancer and observed notable differences in tumor progression based on dietary habits.</p>



<p>The findings could pave the way for lifestyle changes to complement cancer treatment strategies.</p>



<h2 class="wp-block-heading" id="h-understanding-cooking-oils-the-basics">Understanding cooking oils -- the basics</h2>



<p>Cooking oils are a kitchen staple that come in all shapes, sizes, and flavors -- there’s an oil for every cooking need. </p>



<p>Coconut oil has become popular for its unique taste and high smoke point, making it ideal for high-heat cooking, while avocado oil offers a buttery flavor and is packed with healthy fats. </p>



<p>Each oil brings something different to the table, whether you're whipping up a quick stir-fry or baking your favorite cookies.</p>



<p>Beyond just flavor, cooking oils also play a big role in your health. Many oils, like olive and flaxseed, are loaded with heart-healthy fats that can help lower bad cholesterol and keep your heart happy. </p>



<p>On the flip side, it’s good to watch out for oils high in saturated fats, such as palm oil, if you’re trying to maintain a balanced diet. Choosing the right oil can enhance your meals both taste-wise and nutritionally. </p>



<h2 class="wp-block-heading" id="h-diet-and-cancer-progression">Diet and cancer progression</h2>



<p>The year-long study included 100 men with early-stage prostate <a href="https://www.earth.com/news/ketogenic-diet-may-help-the-body-kill-cancer-cells/" target="_blank" rel="noreferrer noopener">cancer</a>. Researchers divided participants into two groups. </p>



<p>One group followed a diet low in omega-6 fats (found in seed oils) and high in omega-3 fats (found in fish like salmon). The other group continued their usual Western diet.</p>



<p>By the end of the study, participants who adjusted their diets showed a&nbsp;15% decrease in tumor aggression markers. </p>



<p>Meanwhile, the group on a standard Western diet saw a&nbsp;24% increase&nbsp;in these markers. These results suggest that dietary fats may influence cancer progression.</p>



<p>"Our findings suggest that something as simple as adjusting your diet could potentially slow cancer growth and extend the time before more aggressive interventions are needed," noted Dr. William Aronson, a professor of urology at <a href="https://www.ucla.edu" target="_blank" rel="noreferrer noopener">UCLA</a> and the study’s lead researcher.</p>



<h2 class="wp-block-heading" id="h-seed-oils-of-the-western-diet">Seed oils of the Western diet </h2>



<p>Seed oils, such as canola, corn, and cottonseed oils, are staples of the Western diet. They are rich in omega-6 fats, which have been linked to increased inflammation in some studies. </p>



<p>Inflammation, in turn, can fuel cancer growth by damaging tissues and weakening the body’s ability to <a href="https://www.earth.com/news/ai-is-the-next-frontier-in-cancer-treatment/" target="_blank" rel="noreferrer noopener">fight tumors</a>.</p>



<p>On the other hand, omega-3 fats, found in fish, nuts, and flaxseeds, are known for their anti-inflammatory properties. </p>



<p>They may support the immune system and reduce tumor growth risks. Previous animal studies also support the idea that lowering omega-6 intake while increasing omega-3 intake can slow cancer progression.</p>



<h2 class="wp-block-heading" id="h-non-invasive-interventions">Non-invasive interventions</h2>



<p>Prostate cancer is the second-leading cause of <a href="https://www.earth.com/news/banana-peel-flour-adds-cancer-fighting-nutrients-to-snacks/" target="_blank" rel="noreferrer noopener">cancer</a>-related deaths in American men. An estimated&nbsp;299,010 cases&nbsp;will be diagnosed in 2024, with approximately&nbsp;201,000 patients&nbsp;in the early stages of the disease. </p>



<p>Many patients opt for active monitoring rather than immediate surgery, radiation, or chemotherapy.</p>



<p>For these patients, lifestyle changes, including diet modifications, could delay the need for aggressive treatments. The study’s results highlight a potential non-invasive option to manage early-stage prostate cancer. </p>



<p>"This significant difference suggests that the dietary changes may help slow cancer growth, potentially delaying or even preventing the need for more aggressive treatments," said Dr. Aronson.</p>



<h2 class="wp-block-heading" id="h-seed-oils-and-cancer-risks">Seed oils and cancer risks</h2>



<p>Despite these findings, leading medical bodies, including the American Heart Association, maintain that seed oils are safe and not linked to <a href="https://www.earth.com/news/which-dietary-changes-are-best-for-cancer-prevention/" target="_blank" rel="noreferrer noopener">cancer</a>. </p>



<p>However, public opinion on seed oils has become increasingly divided. Critics, including public figures like Robert F. Kennedy Jr., claim seed oils contribute to the obesity epidemic and related health concerns.</p>



<p>Adding to the controversy, a recent study from the University of South Florida linked seed oils to rising cases of colon cancer in young adults. </p>



<p>The researchers suggested that the fats in seed oils might promote inflammation, thus creating an environment conducive to tumor growth.</p>



<h2 class="wp-block-heading" id="h-balanced-approach-to-diet">Balanced approach to diet</h2>



<p>The UCLA researchers emphasized that, while their findings are promising, more research is needed to confirm the connection between diet and cancer progression. </p>



<p>They also stressed the importance of maintaining a balanced diet rather than eliminating specific foods.</p>



<p>According to Dr. Aronson, the study&nbsp;is an important step toward understanding how diet can potentially influence prostate cancer outcomes.</p>



<p>Future studies could offer more targeted dietary recommendations for the thousands of men diagnosed with prostate cancer each year. </p>



<p>A deeper understanding of how dietary fats influence cancer might help to reduce reliance on invasive and costly treatments like surgery or chemotherapy.</p>



<h2 class="wp-block-heading" id="h-can-diet-be-a-tool-against-cancer">Can diet be a tool against cancer?</h2>



<p>The evidence suggests that cutting back on omega-6 fats and incorporating omega-3-rich foods could slow the progression of early-stage prostate <a href="https://www.earth.com/news/molecular-jackhammers-a-breakthrough-in-cancer-treatment/" target="_blank" rel="noreferrer noopener">cancer</a>. </p>



<p>However, experts agree that there is a need for further research to validate these findings and provide actionable dietary guidelines.</p>



<p>For now, adopting a balanced diet rich in anti-inflammatory foods like fish, nuts, and seeds may offer additional benefits for <a href="https://www.earth.com/news/caterpillar-fungus-slows-down-growth-of-cancer-cells/" target="_blank" rel="noreferrer noopener">cancer</a> patients. While diet alone may not cure cancer, it could play a significant role in improving outcomes and quality of life.</p>



<p>The study is published in the journal <em><a href="https://ascopubs.org/doi/abs/10.1200/JCO.24.00608">Clinical Oncology</a>.</em></p>



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Many cooking oils in your diet are now being linked to cancer

When we talk about the prevention and management of cancer,...


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<p>Today’s <strong>Video of the Day</strong> from the <a href="https://www.esa.int/">European Space Agency</a> features the Mississippi River, one of the longest rivers in North America.</p>



<p>The Mississippi River is one of the world’s major river systems in size, habitat diversity and biological productivity. The river flows 3,766 km from its source at Lake Itasca through the center of the continental United States to the Gulf of Mexico,&#8221; says ESA.</p>



<p>&#8220;The Mississippi River Basin is home to a variety of agricultural activity. Nutrient-rich soil from sediment deposits through the floodplain supports cropland close to the river and its tributaries. Rectangular fields in the image are cultivated land. The farming of cotton and soybean make up a significant portion of the areas economic production.&#8221;</p>



<p><em>Video Credit: ESA</em></p>



<p><em>&#8211;</em><em>&#8212;</em></p>



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


The Mississippi River in the United States