Today's Image of the Day from NASA features the spiral galaxy NGC 2566, which is located 76 million light-years away in the constellation Puppis. The image was captured by the NASA/ESA Hubble Space Telescope.



“A prominent bar of stars stretches across the center of this galaxy, and spiral arms emerge from each end of the bar. Because NGC 2566 appears tilted from our perspective, its disk takes on an almond shape, giving the galaxy the appearance of a cosmic eye,” said <a href="https://phys.org/news/2024-12-hubble-spies-spiral-galaxy-ngc.html" target="_blank" rel="noreferrer noopener">NASA</a>.



“As NGC 2566 appears to gaze at us, astronomers gaze right back, using Hubble to survey the galaxy's star clusters and star-forming regions.”



<h2 class="wp-block-heading" id="h-complex-appearance-of-ngc-2566">Complex appearance of NGC 2566</h2>



NGC 2566 lies at a considerable distance from Earth, making it a challenging object for amateur astronomers to observe in detail without powerful telescopes.&nbsp;



It can be seen in the Southern Hemisphere sky and is better observed from locations with minimal <a href="https://www.earth.com/news/how-light-pollution-influences-interest-in-astronomy/" target="_blank" rel="noreferrer noopener">light pollution</a>.&nbsp;



The galaxy's arms are populated with young, bright stars, regions of active star formation, and interstellar gas and dust - giving it a dynamic and complex appearance.



<h2 class="wp-block-heading" id="h-measuring-the-ages-of-stars">Measuring the ages of stars</h2>



According to NASA, data from Hubble is especially valuable for studying stars that are just a few million years old. “These stars are bright at the ultraviolet and visible wavelengths to which Hubble is sensitive.”



“Using these data, researchers can measure the ages of NGC 2566's stars, which helps piece together the timeline of the galaxy's star formation and the exchange of gas between star-forming clouds and the stars themselves.”



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



Star formation in <a href="https://www.earth.com/news/shapes-of-one-million-galaxies-hint-at-the-universes-origins/" target="_blank" rel="noreferrer noopener">galaxies</a> is a fascinating and complex process that unfolds over millions of years. It begins in vast clouds of gas and dust, known as molecular clouds, which are often found in the spiral arms of galaxies or in regions of irregular or starburst galaxies.&nbsp;



These clouds provide the raw material for star formation, consisting primarily of hydrogen and helium, with trace amounts of heavier elements.



As the molecular clouds collapse under their own gravity, regions within them begin to condense and fragment, forming dense clumps. Within these clumps, protostars emerge. Their formation is driven by the gravitational pull drawing in surrounding gas.&nbsp;



During this process, the gas heats up due to increasing pressure, eventually igniting nuclear fusion in the core, signaling the birth of a new star.



<h2 class="wp-block-heading" id="h-rate-of-star-formation-nbsp-across-galaxies">Rate of star formation&nbsp;across galaxies</h2>



The rate of star formation varies across galaxies is influenced by numerous factors. In spiral galaxies like the Milky Way, star formation is most active in the spiral arms, where density waves compress gas and dust, triggering the collapse of molecular clouds.&nbsp;



Elliptical galaxies, which often have little cold gas and dust, typically exhibit low rates of star formation or none at all.



Starburst galaxies, on the other hand, experience episodes of exceptionally high star formation, often triggered by <a href="https://www.earth.com/news/webb-captures-a-galaxy-collision-with-a-radiant-smile/">galactic collisions</a> or interactions. 



These events can funnel large amounts of gas into central regions, leading to intense star-forming activity. However, such bursts are usually short-lived on cosmic timescales, exhausting the available gas quickly.



The environment within a galaxy also plays a significant role. Stellar winds and supernova explosions from existing stars can both inhibit and promote star formation. They may disperse gas, preventing further collapse, or compress nearby clouds, triggering new star formation.&nbsp;



Over time, as galaxies evolve, the availability of gas diminishes, leading to a gradual decline in star formation activity.



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



The Puppis constellation in the southern sky represents the stern of a ship. It was once part of a larger constellation known as Argo Navis, which depicted the mythical ship of Jason and the Argonauts.&nbsp;



However, Argo Navis was later divided into three separate constellations: Puppis, Carina (the keel), and Vela (the sails). Puppis is the largest of these three and contains many notable celestial objects.



This constellation is home to several bright stars, including Naos (Zeta Puppis), a hot, massive star that emits intense ultraviolet radiation. Puppis also hosts a wide variety of deep-sky objects, such as open <a href="https://www.earth.com/news/stunning-star-clusters-captured-in-the-extreme-outskirts-of-the-milky-way/" target="_blank" rel="noreferrer noopener">star clusters</a> and nebulae.&nbsp;



Among these, Messier 46 and Messier 47 stand out. Both are beautiful star clusters that are visible through binoculars or small telescopes. The region is dense with stars because it lies along the <a href="https://www.earth.com/news/milky-way-collision-may-change-everything-we-know-about-our-galaxy/" target="_blank" rel="noreferrer noopener">Milky Way</a>, making it a prime area for stargazing and astrophotography. 



Image Credit: NASA



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A cosmic eye in the Puppis constellation

Today's Image of the Day from NASA features the spiral...

Today's Image of the Day from NASA Earth Observatory features a satellite view of retreating glaciers in Alaska, where meltwater is rapidly expanding glacial lakes. 



“In parts of Alaska, water is replacing ice. As glaciers thin and <a href="https://www.earth.com/news/satellite-images-reveal-hidden-retreat-of-arctic-glaciers/" target="_blank" rel="noreferrer noopener">retreat</a>, meltwater collects at their fronts, forming proglacial lakes. According to an analysis by Mauri Pelto, a glaciologist at Nichols College, three such lakes in the southeastern part of the state have grown rapidly in recent decades,” said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



<h2 class="wp-block-heading" id="h-retreating-glaciers-in-alaska">Retreating glaciers in Alaska</h2>



“A trio of glaciers - Yakutat, Alsek, and Grand Plateau - descend from inland mountains and flow onto the coastal plain southeast of Yakutat borough, ending at Harlequin Lake, Alsek Lake, and Grand Plateau Lake,” noted NASA.&nbsp;



The retreat of the glaciers, as well as the growth of the lakes, are visible in the image. When compared to an <a href="https://eoimages.gsfc.nasa.gov/images/imagerecords/153000/153638/fastestlake_tm5_19840705_lrg.jpg" target="_blank" rel="noreferrer noopener">image</a> captured by Landsat 5 in the summer of 1984, the changes are even more evident.



NASA elaborated on the extent of the glacier retreat from 1984 to 2024. “During this period, Yakutat Glacier’s main arm retreated 4.3 miles, while Alsek Glacier’s northern and southern arms retreated 3.3 miles and 3.4 miles, respectively. Grand Plateau Glacier’s northern arm lost the most, retreating 4.8 miles.”



<h2 class="wp-block-heading" id="h-glacial-lakes-doubled-in-size-nbsp">Glacial lakes doubled in size&nbsp;</h2>



“Collectively, the three lakes more than doubled in size over 40 years. In 1984, they covered about 50 square miles. By 2024, they spanned 90 square miles. That’s an area larger than Seneca Lake (67 square miles) - one of the Finger Lakes in New York, which also have a glacial origin,” said NASA.



Pelto noted that the lakes forming in this region are immense - starting at the mountains and spreading toward the coast - making this a new lake district that is unique in our nation.



“Millions of other lakes, named and unnamed, dot the state. But this system has grown fast, so much so that Pelto thinks it might represent the fastest lake growth in the United States this century,” said NASA.



<h2 class="wp-block-heading" id="h-understanding-glacier-retreat-nbsp">Understanding glacier retreat&nbsp;</h2>



Glacier retreat is a significant phenomenon driven primarily by global warming the results from rising greenhouse gas <a href="https://www.earth.com/news/global-carbon-dioxide-emissions-hit-a-record-high-in-2023/" target="_blank" rel="noreferrer noopener">emissions</a>.&nbsp;



As temperatures rise, glaciers lose more ice during the summer melt than they can regain in winter snowfall, causing them to shrink over time. This process has profound implications for ecosystems, water resources, and global sea levels.



<h3 class="wp-block-heading" id="h-glacial-lakes">Glacial lakes</h3>



When glaciers retreat, they often leave behind depressions in the landscape that can fill with meltwater, forming glacial lakes. These lakes are typically bounded by natural dams made of rock, ice, or moraine - accumulations of debris left behind by the glacier's movement.&nbsp;



Over the past century, the number and size of glacial lakes worldwide have increased significantly due to the accelerating pace of <a href="https://www.earth.com/news/tropical-glaciers-offer-a-glimpse-of-our-harsh-climate-reality/" target="_blank" rel="noreferrer noopener">glacier</a> retreat. This trend is especially evident in high-altitude regions like the Himalayas, the Andes, and the Alps, as well as in polar areas such as Alaska and Greenland.



<h3 class="wp-block-heading" id="h-positive-and-negative-impacts-nbsp">Positive and negative impacts&nbsp;</h3>



Glacial lakes can have both positive and negative impacts. They provide critical water sources for downstream communities, support biodiversity, and sometimes offer opportunities for hydropower development or tourism.&nbsp;



However, they also pose serious risks. The dams holding back these lakes can fail suddenly, causing glacial lake outburst floods (GLOFs). These catastrophic events can devastate downstream areas, destroying infrastructure, agricultural lands, and habitats while endangering human lives.



<h3 class="wp-block-heading" id="h-monitoring-changes">Monitoring changes</h3>



Understanding glacier retreat and glacial lake formation requires a multidisciplinary approach, combining climate science, hydrology, and geology.&nbsp;



Monitoring these changes is essential to mitigate associated risks and adapt to the evolving landscape shaped by a <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fperu-has-lost-over-half-of-its-glaciers-in-six-decades%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">warming planet</a>.



<h2 class="wp-block-heading" id="h-glacier-retreat-worldwide">Glacier retreat worldwide</h2>



Studies and satellite observations show that most glaciers in almost all regions of the world are shrinking.&nbsp;



Melting glaciers contribute significantly to global <a href="https://www.earth.com/news/emergency-meeting-reveals-the-alarming-extent-of-antarcticas-ice-loss/" target="_blank" rel="noreferrer noopener">sea level rise</a>, which threatens coastal communities and ecosystems.



The retreat of glaciers is considered one of the clearest indicators of climate change.&nbsp;Some glaciers are retreating at unprecedented rates, indicating accelerating climate impacts.



The image was captured on August 4, 2024 by the Landsat 8 satellite.



Image Credit: NASA Earth Observatory



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Retreating glaciers and expanding meltwater lakes in Alaska

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

Today's Image of the Day from NASA Earth Observatory features the Costa Atlántica Reserve stretching along the Atlantic coast in Argentina.



“At the far southern reaches of South America, a stretch of tidal flats, shoals, and beaches serves as a refuge for migratory shorebirds and copious aquatic life,” said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



“The Costa Atlántica Reserve in Argentina extends for 220 kilometers (140 miles) along the eastern shore of Tierra del Fuego. The area was designated a Ramsar site in 1995 and a provincial nature reserve in 1998." 



According to NASA, the reserve is the southernmost site both on the Ramsar list and in the Western Hemisphere Shorebird Reserve Network.



<h2 class="wp-block-heading" id="h-significance-of-the-costa-atlantica-reserve">Significance of the Costa Atlántica Reserve</h2>



The Costa Atlántica Reserve is an important conservation site that signifies Argentina's commitment to preserving its rich <a href="https://www.earth.com/news/human-induced-changes-in-ocean-salinity-threaten-biodiversity-and-marine-ecosystems/" target="_blank" rel="noreferrer noopener">coastal biodiversity</a>.&nbsp;



This vast expanse of protected area serves as a sanctuary for many species, ranging from migratory birds to marine mammals and diverse plant life.



“Tidal habitats along the coast support some 135 species of birds, while crustaceans, mollusks, fish, and cetaceans feed in the productive coastal waters,” said NASA.&nbsp;



“The topography inland of Costa Atlántica, stretching into Chile to the west, is blanketed in shrubs and grassland vegetation adapted to dry conditions - part of a semiarid ecosystem known as the Fuegian steppe.”



<h2 class="wp-block-heading" id="h-maintaining-ecological-balance-nbsp">Maintaining ecological balance&nbsp;</h2>



Established to safeguard the delicate ecosystems of dunes, estuaries, and <a href="https://www.earth.com/news/coastal-lagoons-have-high-loads-of-microplastics/" target="_blank" rel="noreferrer noopener">coastal lagoons</a>, the reserve plays a crucial role in maintaining ecological balance.&nbsp;



The Costa Atlántica Reserve provides critical habitats for numerous threatened species, including the <a href="https://www.earth.com/news/southern-right-whales-have-shifted-their-foraging-grounds/">Southern Right Whale</a>, which finds refuge in these waters during its breeding season. 



The reserve’s sheltered bays and nutrient-rich waters create an ideal environment for mothers to nurse their calves before embarking on long migrations. 



In addition to whales, the reserve supports populations of sea lions and Magellanic penguins. Its protection is vital for the long-term survival of these species in the face of climate change and human activity.



<h2 class="wp-block-heading" id="h-costa-atlantica-reserve-a-living-laboratory-nbsp">Costa Atlántica Reserve: A living laboratory&nbsp;</h2>



The Costa Atlántica Reserve is not only a refuge for wildlife but also a living laboratory for scientific research. 



Conservationists and researchers work within its bounds to monitor ecosystems, study species behaviors, and develop strategies for sustainable management. 



This ongoing research is pivotal in understanding the impacts of climate change on <a href="https://www.earth.com/news/coastal-river-deltas-face-major-threats-beyond-climate-change/" target="_blank" rel="noreferrer noopener">coastal environments</a> and in devising measures to mitigate these effects.



Furthermore, the reserve illustrates the importance of community involvement in conservation efforts. Local communities are engaged in sustainable tourism and educational programs.&nbsp;



Through <a href="https://www.earth.com/news/how-bird-photographers-improve-nesting-success/" target="_blank" rel="noreferrer noopener">eco-tourism</a> initiatives, visitors can experience the natural beauty of the reserve while contributing to its preservation.



<h2 class="wp-block-heading" id="h-tierra-del-fuego-archipelago">Tierra del Fuego archipelago</h2>



According to NASA, the broader landscape of the Tierra del Fuego archipelago was shaped by glaciers.&nbsp;



“Ice advanced over the mountains and lowlands during cold climatic periods between the mid-Pleistocene, about 1 million years ago, and the Last Glacial Maximum, about 20,000 years ago. San Sebastián Bay formed in a tectonic depression that was deepened by glacial erosion," noted NASA.&nbsp;



“Further evidence of glaciation, including hummocky moraines and fields of glacial erratics, appears around the bay, though it is too small to be visible in this image.”



“Partially enclosed by a long, sandy peninsula, San Sebastián Bay attracts copious migratory birds, some of which shuttle seasonally between the Northern and Southern Hemispheres.”



“Large populations of the Hudsonian godwit, white-rumped sandpiper, and other long-distance flyers congregate in the vast intertidal zones. This part of the reserve, however, is vulnerable to the impact of oil and gas extraction from onshore and offshore deposits.”



The image was captured on February 20, 2024 by the <a href="https://landsat.gsfc.nasa.gov/satellites/landsat-9/landsat-9-instruments/oli-2-design/" target="_blank" rel="noreferrer noopener">OLI-2</a> (Operational Land Imager-2) on Landsat 9.



Image Credit: NASA Earth Observatory&nbsp;



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Costa Atlántica Reserve in Argentina

Today's Image of the Day from NASA Earth Observatory features an explosive eruption of Mount Etna, the most active volcano in Europe. The photo was captured on February 13 by the OLI (Operational Land Imager) on the Landsat 8 satellite.



<a href="https://earthobservatory.nasa.gov/images/153962/river-of-fire-on-mount-etna" target="_blank" rel="noreferrer noopener">NASA</a> noted that the natural-color scene is overlaid with an infrared signal to distinguish the lava’s heat signature on the mountain's snowy slopes.



<h2 class="wp-block-heading" id="h-signs-of-unrest">Signs of unrest</h2>



“On February 8, 2025, Italy’s National Institute of Geophysics and Volcanology (INGV) reported that Mount Etna had begun exhibiting ‘signs of unrest above its background level,’”&nbsp;said NASA.



“That’s unsurprising for the frequently unruly Sicilian peak, one of the most active stratovolcanoes in the world. But the fiery explosions, disruptive ash clouds, and long lava flows that ensued stood out as being unusually spectacular to many Etna watchers.”



<h2 class="wp-block-heading" id="h-intensifying-eruptions-on-mount-etna">Intensifying eruptions on Mount Etna </h2>



The activity intensified on February 10th, with lava flowing from the Bocca Nuova crater at an altitude of approximately 3,000 meters above sea level.&nbsp;



According to news reports, the eruption created a striking visual as molten lava traversed the snow-covered slopes, producing rivers of lava up to 3 kilometers long and emitting ash plumes visible from several kilometers away.



The <a href="https://www.earth.com/news/new-research-enhances-predictions-on-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">volcanic activity</a> attracted thousands of tourists eager to witness the spectacle. However, the influx of visitors led to traffic congestion, obstructing emergency services and prompting warnings from local authorities about the potential dangers of approaching the active volcano.



<h2 class="wp-block-heading" id="h-impacts-of-mount-etna-eruptions">Impacts of Mount Etna eruptions </h2>



Despite the dramatic displays, there were no reports of injuries or significant property damage, though experts continue to closely monitor the situation.



Satellite imagery has provided detailed views of the active lava flow cutting through the snow-covered slopes, with ash plumes dispersing from the summit.



“The presence of ash prompted authorities to raise the aviation color code to orange on February 13. On other days during this eruption, it was elevated to red, the highest level of concern. The airport in nearby Catania diverted flights amid hazardous conditions, according to news reports,” said NASA.



“Since Etna stirred to life this time around, crowds of hikers and even some skiers flocked to its slopes to witness the fiery displays and lava flows melting through snow. The eruption was ongoing as of February 18, with weak ash emissions and decreasing explosive activity.”



<h2 class="wp-block-heading" id="h-a-volcano-with-a-long-history">A volcano with a long history </h2>



Mount Etna has a history stretching back hundreds of thousands of years. Located on the east coast of Sicily, near Catania, the volcano has shaped the landscape and influenced human civilization.



The volcano’s activity dates back at least 500,000 years, with its earliest eruptions occurring beneath the sea before the landmass emerged. Over time, lava flows, <a href="https://www.earth.com/news/yellowstone-supervolcano-eruption-study-sparks-new-debate-on-where-and-when-it-will-erupt/" target="_blank" rel="noreferrer noopener">eruptions</a>, and collapses have sculpted the towering stratovolcano seen today.



Ancient civilizations were well aware of Etna’s power. Greek mythology depicted it as the forge of Hephaestus, the god of fire, while the poet Pindar described its violent eruptions. The philosopher Empedocles was even said to have perished in its fiery depths.&nbsp;



Etna’s eruptions were documented throughout Roman history, including a major event in 122 BC that devastated Catania.



During the Middle Ages and Renaissance periods, Etna continued its eruptions, frequently altering its landscape and affecting nearby settlements.&nbsp;



<h2 class="wp-block-heading" id="h-monitoring-the-activity-of-mount-etna">Monitoring the activity of Mount Etna </h2>



One of the most devastating eruptions occurred in 1669, when lava flows destroyed several villages and overwhelmed parts of Catania’s city walls. Despite these dangers, people continued to live and farm on Etna’s fertile slopes, taking advantage of its rich volcanic soil.



Scientific study of Mount Etna began in the 19th and 20th centuries, as researchers sought to understand its behavior and mitigate its risks. Advances in monitoring technology have since helped track its activity, though eruptions remain unpredictable.&nbsp;



In modern times, Etna continues to be one of the most closely watched <a href="https://www.earth.com/news/axial-seamount-large-underwater-volcano-off-us-coast-will-likely-erupt-in-2025/" target="_blank" rel="noreferrer noopener">volcanoes</a> in the world, with frequent eruptions, ash clouds, and lava flows affecting air travel and local communities.



Mount Etna was designated a UNESCO World Heritage Site in 2013 due to its geological significance and cultural history.&nbsp;



Today, the <a href="https://www.earth.com/news/earths-next-big-volcano-eruption-will-cause-global-chaos-climate-impact/" target="_blank" rel="noreferrer noopener">volcano</a> attracts tourists, scientists, and locals alike, serving as both a reminder of nature’s power and a source of economic and scientific interest.



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Fiery eruption of Mount Etna captured from space

Today's Image of the Day from the European Space Agency features NGC 1333, a reflection nebula located in the Perseus molecular cloud about 960 light-years away from Earth. The photo is a mosaic of images captured by the James Webb Space Telescope.



<h2 class="wp-block-heading" id="h-the-power-of-webb-nbsp-nbsp">The power of Webb&nbsp;&nbsp;</h2>



“Webb’s superb sensitivity allows astronomers to investigate young objects with extremely low masses. Some of the faintest ‘stars’ in the picture are in fact newly born free-floating brown dwarfs with masses comparable to those of giant planets,” noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.



The same cluster was featured as the 33rd anniversary image of the Hubble Space Telescope in April 2023.&nbsp;



According to ESA, Hubble’s image just scratched the surface of this region, because clouds of dust obscure much of the star formation process. 



"Observing with larger aperture and in the infrared part of the spectrum, Webb is capable of peering through the dusty veil to reveal newborn stars, brown dwarfs and planetary mass objects."



<h2 class="wp-block-heading" id="h-webb-s-view-of-ngc-1333">Webb’s view of NGC 1333</h2>



ESA noted that the center of the image presents a deep peek into the heart of the NGC 1333 cloud. 



“Across the image we see large patches of orange, which represent gas glowing in the infrared. These so-called Herbig-Haro objects form when ionized material ejected from young stars collides with the surrounding cloud. They are hallmarks of a very active site of star formation."



The disks of gas and dust that surround the <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">stars</a> in this image may eventually produce planetary systems.&nbsp;



<h2 class="wp-block-heading" id="h-formation-of-the-sun">Formation of the Sun</h2>



“Similar to the young stars in this mosaic, our own Sun and planets formed inside a dusty molecular cloud, 4.6 billion years ago. Our Sun did not form in isolation but as part of a cluster, which was perhaps even more massive than NGC 1333,” explained ESA.



Over time, the stars in the Sun's birth cluster would have drifted apart due to gravitational interactions and the dispersion of gas in the region.



Astronomers have been studying certain clues, such as isotopic signatures in meteorites, that hint the Sun may have formed near massive stars. These stars likely produced supernovae, which could have influenced the early <a href="https://www.earth.com/news/mysterious-objects-spotted-in-the-outer-solar-system-beyond-pluto/" target="_blank" rel="noreferrer noopener">solar system</a> by injecting heavy elements like iron-60.



<h2 class="wp-block-heading" id="h-star-formation-in-ngc-1333">Star formation in NGC 1333</h2>



NGC 1333 is a vibrant example of a stellar nursery, where active <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 ongoing. It is known for its chaotic appearance, shaped by the interactions between newborn stars and the surrounding material.



Within NGC 1333, astronomers have observed a high level of turbulence, which makes the region dynamic and complex. 



These disturbances are caused by the outflows of young stars as they eject material into their surroundings, creating shock waves and influencing further star formation.&nbsp;



These outflows are often seen as jets, which are visible in multiple wavelengths of light, especially infrared, as the surrounding dust absorbs visible light.



<h2 class="wp-block-heading" id="h-significance-of-ngc-1333">Significance of NGC 1333</h2>



NGC 1333 is also an area of interest for studying the early stages of star and <a href="https://www.earth.com/news/planet-formation-new-insights-mechanics-physics/" target="_blank" rel="noreferrer noopener">planet formation</a>, as many of the stars within the cluster are in their infancy, still in the process of gathering material and developing protoplanetary disks.&nbsp;



In images, NGC 1333 is marked by bright patches of blue and red, representing reflection <a href="https://www.earth.com/news/six-rogue-worlds-discovered-inside-a-young-star-forming-nebula/" target="_blank" rel="noreferrer noopener">nebulae</a> and the ionized gas created by energetic young stars.&nbsp;



<h2 class="wp-block-heading" id="h-the-perseus-molecular-cloud-nbsp">The Perseus molecular cloud&nbsp;</h2>



The Perseus molecular cloud is a vast region of cold gas and dust located about 600 light-years away from Earth in the constellation <a href="https://www.earth.com/news/1500-billion-orphan-stars-discovered-in-the-perseus-galaxy-cluster/" target="_blank" rel="noreferrer noopener">Perseus</a>.&nbsp;



It is one of the most studied star-forming regions in our galaxy due to its relative proximity and the diversity of its young stellar objects. This cloud spans several hundred light-years and contains dense pockets of gas where new stars are actively forming.&nbsp;



These areas are often enshrouded in thick dust, which obscures them in visible light but allows astronomers to study them using infrared and radio wavelengths.



The Perseus molecular cloud is particularly interesting because of the chemistry taking place within it, including the formation of complex organic molecules that could be precursors to life.&nbsp;



Image Credit: ESA/Webb, NASA &amp; CSA



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Stellar nursery shines in the Perseus cloud

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

Fossils newly unearthed in southeastern Australia have upended long-held assumptions about dinosaur evolution, revealing the world’s oldest known megaraptorid and the first confirmed evidence of carcharodontosaurs on the continent.&nbsp;



These discoveries paint a vivid picture of an unusual predator hierarchy that once roamed the region during the Early Cretaceous, adding a crucial piece to the puzzle of dinosaur history.



The research was carried out by a team led by <a href="https://museumsvictoria.com.au/research-institute/">Museums Victoria Research Institute</a> and <a href="https://www.monash.edu/">Monash University</a> PhD student Jake Kotevski.&nbsp;



The study focused on five <a href="https://www.earth.com/news/large-theropod-dinosaurs-thrived-in-polar-environments/">theropod</a> fossils found along Victoria’s coastline. They were collected in the upper Strzelecki (Bass Coast, dating back roughly 121.4–118 million years) and the Eumeralla Formation (Otway Coast, about 113–108 million years old).



<h2 class="wp-block-heading" id="h-dinosaurs-thriving-in-australia-nbsp">Dinosaurs thriving in Australia&nbsp;</h2>



The newly studied remains suggest an unexpected arrangement of carnivorous dinosaurs. They indicate that large megaraptorids - measuring between six and seven meters long - coexisted alongside smaller carcharodontosaurs that reached only two to four meters in length, as well as the agile, meter-long unenlagiines (nicknamed “southern raptors”). 



This stands in stark contrast to better-known ecosystems where carcharodontosaurs typically surpassed other predatory dinosaurs in size.



“The discovery of carcharodontosaurs in Australia is groundbreaking,” Kotevski said. “It’s fascinating to see how Victoria’s predator hierarchy diverged from South America, where carcharodontosaurs reached <a href="https://www.earth.com/news/t-rex-was-about-70-percent-bigger-than-we-thought/">Tyrannosaurus rex</a>-like sizes up to 13 metres, towering over megaraptorids. Here, the roles were reversed, highlighting the uniqueness of Australia’s Cretaceous ecosystem.”



Two of the newly identified fossils rank among the earliest megaraptorids known worldwide, prompting experts to reconsider their evolutionary timeline.&nbsp;



Because these megaraptorids thrived in Australia at such an early date, they may have played a more pivotal role in Gondwanan <a href="https://www.earth.com/news/new-predatory-dinosaur-species-identified-in-lost-photos/">predator</a> communities than previously recognized.



<h2 class="wp-block-heading" id="h-new-clues-about-dinosaur-migration-nbsp">New clues about dinosaur migration&nbsp;</h2>



According to Dr. Thomas Rich, senior curator of vertebrate palaeontology at Museums Victoria Research Institute, the fossils also hint at broader patterns of dinosaur dispersal in the Southern Hemisphere.&nbsp;



He noted that the findings not only expand Australia’s theropod fossil record but offer compelling evidence of faunal interchange between Australia and South America through Antarctica during the Early Cretaceous.&nbsp;



“The findings also challenge previous assumptions about body-size hierarchies in Gondwanan predator ecosystems highlighting Victoria’s unique <a href="https://www.earth.com/news/extraordinary-dinosaur-fossils-discovered-from-the-end-of-cretaceous-era/">Cretaceous</a> fauna,” xplained Dr. Rich.



These links to other Gondwanan regions bolster the theory that dinosaurs and other animals migrated between connected landmasses before shifting continents isolated certain populations.&nbsp;



Over time, such isolation could have led to distinct paths of <a href="https://www.earth.com/news/dinosaurs-evolved-feathers-for-much-more-than-just-flying/">evolutionary development</a>, explaining why Australian megaraptorids, rather than carcharodontosaurs, occupied the apex predator niche.



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



Beyond revealing hidden chapters of Australia’s dinosaur history, the study demonstrates the significance of museum collections in fueling new scientific breakthroughs. 



Researchers often depend on carefully preserved fossils that can remain unclassified for decades, awaiting fresh analytical methods or new comparative specimens before their true importance is revealed.



“Museum collections are crucial to advancing our understanding of prehistoric life,” said Tim Ziegler, the vertebrate palaeontology collection manager at Museums Victoria Research Institute.&nbsp;



“Specimens preserved in the State Collection for decades - unidentifiable until now - are providing new insights into the evolution of dinosaur ecosystems.”



The project also illustrates a longstanding tradition of mentorship, continuity, and collaboration among palaeontologists. Senior curator Dr. Rich, at Museums Victoria since 1974, has worked with multiple generations of researchers.&nbsp;



These efforts culminate in cutting-edge studies like Kotevski’s PhD research, forming a chain of inquiry that steadily advances what we know about ancient life.



<h2 class="wp-block-heading" id="h-volunteers-in-the-field">Volunteers in the field</h2>



Three of the fossils in this study were first identified between 2022 and 2023 by a Museums Victoria volunteer, Melissa Lowery, demonstrating the critical role that community members play in paleontology.&nbsp;



With an eye for intriguing shapes and textures, volunteers often detect clues that lead to major discoveries.



Kotevski and his colleagues continue to search for additional remains at key sites, including the location where the large megaraptorid was found.&nbsp;



These expeditions form part of the long-running <a href="http://dinosaurdreaming.monash.edu/">Dinosaur Dreaming project</a>, responsible for uncovering over 10,000 fossils - from dinosaurs and birds to mammals and marine reptiles - since it began.&nbsp;



Each new bone or tooth refines scientists’ understanding of the richly varied ecosystems that existed on Australia’s ancient coastlines.



<h2 class="wp-block-heading" id="h-dinosaurs-of-cretaceous-australia">Dinosaurs of Cretaceous Australia</h2>



Unusual for reversing the roles typically observed in other continents, Victoria’s predator lineage helps paleontologists envision a world where megaraptorids reigned supreme while smaller carcharodontosaurs prowled in their shadow.&nbsp;



By confirming that early megaraptorids inhabited the region and that carcharodontosaurs were present yet less dominant, these fossils challenge orthodox views on predator size hierarchies and evolutionary pathways within Gondwana.



As fieldwork continues, each new fragment of bone has the potential to reshape our perspective on how dinosaurs spread across the prehistoric southern supercontinent, adapted to different environments, and carved out ecological niches.&nbsp;



Together, the fossils detail a singular evolutionary story that sets Cretaceous Australia apart, forever changing how we see the era’s predatory power dynamics - and offering fresh directions for future discoveries.



Image Credit: Artwork by Jonathan Metzger. Source: Museums Victoria



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Fossils discovered in Australia rewrite dinosaur history

Fossils newly unearthed in southeastern Australia have upended long-held assumptions...

Male fruit flies buzzing around in a small, contained arena sounds like a pretty ordinary science experiment. Yet one group of researchers noticed something unusual about how some of them reacted to a spinning disk.



They observed that while many flies stayed away from the disk, a select few hopped onto it and stayed for surprising amounts of time. 



<a href="https://sciprofiles.com/profile/2253355" target="_blank" rel="noreferrer noopener">Dr. Wolf Huetteroth</a> from the <a href="https://www.uni-leipzig.de/en" target="_blank" rel="noreferrer noopener">University of Leipzig</a> notes that these findings could open new questions about how body awareness develops in living creatures.



<h2 class="wp-block-heading" id="h-flies-spin-with-purpose">Flies spin with purpose</h2>



Many people think of fruit flies as tiny <a href="https://www.earth.com/news/insects-fruit-flies-smell-well-as-humans-with-much-less-nose-neurons/" target="_blank" rel="noreferrer noopener">creatures</a> flitting around fruit bowls. Yet a recent study suggests that they might show optional behavior patterns that fit the definition of play. This observation challenges old assumptions about insects.



“Using several carousels, we generated and analyzed a total of around seven years of film data,” says Dr. <a href="https://www.researchgate.net/profile/Tilman-Triphan" target="_blank" rel="noreferrer noopener">Tilman Triphan</a>, the first author of the study. 



Researchers used several rotating platforms placed under a thin glass cover. Some flies dashed to the edge, but others returned to the carousel again and again.&nbsp;



<h2 class="wp-block-heading" id="h-individual-preferences">Individual preferences</h2>



A fraction of the <a href="https://www.earth.com/news/fruit-flies-on-treadmills-video-shows-how-insects-walk-and-balance/" target="_blank" rel="noreferrer noopener">flies</a> sought the disk and rode it in repeated sessions. Those individuals spent extended periods on the spinner, while their peers avoided it altogether. The behavior looked deliberate, rather than forced or random.



One aspect was the difference in how these seekers got onto the spinning surface. 



“However, we were able to distinguish whether the flies had deliberately walked onto the carousel or jumped onto it in an uncoordinated way. This allowed us to show that unplanned visits to the carousel were rather atypical for the playing flies,” says co-author <a href="https://www.northumbria.ac.uk/about-us/our-staff/f/clara-ferreira/" target="_blank" rel="noreferrer noopener">Dr. Clara H. Ferreira</a>, an assistant Professor at <a href="https://www.northumbria.ac.uk/" target="_blank" rel="noreferrer noopener">Northumbria University</a>.



<h2 class="wp-block-heading" id="h-possible-value-of-body-sense">Possible value of body sense</h2>



The repeated interaction with the moving disk seems to involve <a href="https://journals.physiology.org/doi/full/10.1152/physrev.00048.2011" target="_blank" rel="noreferrer noopener">proprioceptive feedback</a>, which refers to the body’s sense of position and motion.



If some flies are actively seeking the extra sensation, it might be fulfilling a hidden benefit. This is reminiscent of how certain mammals, like <a href="https://pubmed.ncbi.nlm.nih.gov/9861614/" target="_blank" rel="noreferrer noopener">rats</a>, engage in rough-and-tumble routines that refine their coordination.



Some insects ended up swapping mealtime for more spins on the carousel. That trade-off hints at a possible reward gained from the turning <a href="https://www.earth.com/news/dragonflies-develop-waxy-coating-to-withstand-warmer-climates/" target="_blank" rel="noreferrer noopener">motion</a>. 



The interesting part is that these insects showed no direct advantage other than what seems to be playful amusement.



<h2 class="wp-block-heading" id="h-flies-spin-by-choice-not-force">Flies spin by choice, not force</h2>



Natural curiosity is often observed in higher animals, but insects rarely get credit for it. 



Here, the setting was calm, with continuous observation over days to capture genuine conduct. There were no artificial triggers that forced the flies onto the disk.



The team set up the environment to ensure no threat forced the flies to remain. If the spinning platform caused anxiety, they could easily walk away. 



Instead, some made a personal choice to return. This self-directed action adds weight to the suggestion of a real <a href="https://www.earth.com/news/flies-are-more-vulnerable-to-climate-change-than-bees/" target="_blank" rel="noreferrer noopener">playful attitude</a>.



<h2 class="wp-block-heading" id="h-why-does-it-matter-for-humans">Why does it matter for humans?</h2>



“This could help us to find out how we humans also develop efficient self-awareness of our bodies,” says Huetteroth. 



The clue lies in how the spinning motion may sharpen the brain’s ability to map physical space. Because the flies appear to seek out extra movement, they might be training themselves to adapt and respond to unexpected motion.



Similar responses appear in many species that enjoy roller coasters or spinning rides. Researchers believe the <a href="https://www.earth.com/news/how-human-brain-connects-unrelated-concepts-through-reasoning/" target="_blank" rel="noreferrer noopener">brain learns</a> from these experiences, reinforcing internal models of balance and orientation.



If a small insect displays a version of this, it might show that the drive to engage in such activity evolved long ago.



<h2 class="wp-block-heading" id="h-flies-spin-despite-easy-alternatives">Flies spin despite easy alternatives</h2>



The flies had easy access to food and water. They also had corners to rest without interruption. Despite these calmer options, some crawled over for a spin. 



That behavior did not enhance survival, which points toward a motivational factor besides hunger or fear.



Scientists have used <a href="https://pubmed.ncbi.nlm.nih.gov/5787388/" target="_blank" rel="noreferrer noopener">open-field tests</a> to measure caution or stress in animals. 



Usually, creatures stay near edges when anxious. The carousel-seeking flies, however, went to the center and stayed. This breaks usual fear-driven patterns.



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



So far, scientists have only glimpsed how fruit flies pick between exploration, feeding, and spinning. The genetic tools available in fruit <a href="https://www.earth.com/news/chemicals-are-changing-insects-in-subtle-yet-deadly-ways/" target="_blank" rel="noreferrer noopener">flies</a> might shine more light on the neural wiring behind this playful bent. 



Perhaps targeted genetic studies will uncover exactly which circuits reward them for spinning.



In time, deeper understanding could reveal ways that controlled motion shapes a creature’s internal map. 



That concept might prove relevant to other animals, including humans learning how to handle complex movement or interactive environments.



The study is published in <a href="https://www.cell.com/current-biology/fulltext/S0960-9822(25)00055-7?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982225000557%3Fshowall%3Dtrue" target="_blank" rel="noreferrer noopener">Current Biology</a>.



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Flies like to play and have fun like other animals, according to a fascinating new study

Male fruit flies buzzing around in a small, contained arena...

Scientists have devised an affordable way to permanently remove carbon dioxide from the atmosphere by converting common minerals into highly reactive substances that spontaneously lock away CO2. 



This breakthrough could play a critical role in curbing global warming by addressing one of its primary causes.



The new technique was developed by chemists at <a href="https://www.stanford.edu/">Stanford University</a> Matthew Kanan, a professor of chemistry and senior author of the paper, explained the motivation behind the carbon capture research.



“The Earth has an inexhaustible supply of <a href="https://www.earth.com/news/chinas-rare-earth-jackpot-1-15-million-tons-of-minerals-uncovered/">minerals</a> that are capable of removing CO2 from the atmosphere, but they just don’t react fast enough on their own to counteract human greenhouse gas emissions. Our work solves this problem in a way that we think is uniquely scalable.”



<h2 class="wp-block-heading" id="h-rapid-carbon-removal-with-new-chemistry">Rapid carbon removal with new chemistry </h2>



In nature, silicate minerals gradually bind with CO2 through <a href="https://www.earth.com/news/natural-rock-weathering-is-a-co2-source-comparable-to-volcanoes/">weathering</a>, forming stable carbonates over hundreds or thousands of years.&nbsp;



Researchers worldwide have long sought methods to accelerate this slow process, often referred to as enhanced weathering. 



Kanan and Stanford postdoctoral scholar Yuxuan Chen found a way to make silicates rapidly absorb carbon, thanks to what Chen describes as a “new chemistry.”



“We envisioned a new chemistry to activate the inert silicate minerals through a simple ion-exchange reaction,” said Chen, who led the lab work. “We didn’t expect that it would work as well as it does.”



By speeding up mineral reactions that would otherwise unfold over centuries, this approach has the potential to remove significant amounts of <a href="https://www.earth.com/news/how-carbon-dioxide-travels-in-the-atmosphere/">carbon dioxide</a> from the air in a fraction of the time.



<h2 class="wp-block-heading" id="h-more-efficient-mineral-transformation">More efficient mineral transformation</h2>



Existing carbon removal strategies - such as direct <a href="https://www.earth.com/news/capturing-carbon-directly-from-the-air-is-now-much-more-efficient-thanks-to-new-material/">air capture</a> - often rely on energy-intensive equipment, including large fans, chemicals, and other methods to filter out CO2. They can be both costly and difficult to scale. In contrast, the Stanford scientists point to the energy savings of their approach.



“Our process would require less than half the energy used by leading direct air capture technologies, and we think we can be very competitive from a cost point of view,” said Kanan, who is also a senior fellow at the <a href="https://energy.stanford.edu/" target="_blank" rel="noreferrer noopener">Precourt Institute for Energy</a> in the Stanford Doerr School of Sustainability.



In their experiments, the team heated limestone (calcium carbonate) in a kiln to produce calcium oxide, then combined this material with silicate minerals containing magnesium.&nbsp;



When the two substances were heated together, they exchanged ions and yielded magnesium oxide and calcium silicate - both of which readily take up carbon from the air.



“The process acts as a multiplier,” Kanan noted. “You take one reactive mineral, calcium oxide, and a magnesium silicate that is more or less inert, and you generate two reactive minerals.”



<h2 class="wp-block-heading" id="h-trapping-carbon-with-simple-chemistry">Trapping carbon with simple chemistry </h2>



<a href="https://www.earth.com/news/new-crack-resistant-cement-material-inspired-by-nature/">Cement</a> manufacturers have used kilns for centuries, processing limestone at high temperatures to create key ingredients for concrete. The Stanford method adapts this time-tested approach but substitutes part of the cement mixture with magnesium silicates.



When these newly formed minerals are exposed to water and carbon dioxide - even at the relatively low concentrations found in ambient air - they spontaneously convert CO2 into stable carbonates.&nbsp;



Laboratory tests showed that wet samples of magnesium oxide and calcium silicate could trap carbon in weeks to months, far outpacing natural weathering.



“You can imagine spreading magnesium oxide and calcium silicate over large land areas to remove CO2 from ambient air,” Kanan said.&nbsp;



“One exciting application that we’re testing now is adding them to agricultural soil. As they weather, the minerals transform into bicarbonates that can move through the soil and end up permanently stored in the ocean.”



<h2 class="wp-block-heading" id="h-potential-benefits-for-farmers">Potential benefits for farmers</h2>



Soil treatments commonly include calcium carbonate (lime) to raise pH when it is too acidic. In principle, farmers could switch to these new reactive minerals instead of conventional lime.&nbsp;



“Adding our product would eliminate the need for liming, since both mineral components are alkaline,” Kanan explained.&nbsp;



“In addition, as calcium silicate weathers, it releases silicon to the soil in a form that the plants can take up, which can improve crop yields and resilience. Ideally, farmers would pay for these minerals because they’re beneficial to farm productivity and the health of the soil - and as a bonus, there’s the carbon removal.”



<h2 class="wp-block-heading" id="h-scaling-up-for-global-impact">Scaling up for global impact</h2>



According to Kanan’s team, ramping up production to a meaningful scale would require converting millions of tons of silicate minerals each year.&nbsp;



“Each year, more than 400 million tons of mine tailings with suitable silicates are generated worldwide, providing a potentially large source of raw material,” Chen said.&nbsp;



“It’s estimated that there are more than 100,000 gigatons of olivine and serpentine reserves on Earth, enough to permanently remove far more CO2 than humans have ever emitted.”



<h2 class="wp-block-heading" id="h-nature-s-carbon-solution">Nature's carbon solution</h2>



After factoring in emissions from heating kilns using natural gas or <a href="https://www.earth.com/news/biofuels-may-eliminate-90-of-black-smoke-emissions-from-cars/">biofuel</a>, the researchers estimate that each ton of their final material can remove one ton of CO2 from the atmosphere.&nbsp;



For context, fossil fuel emissions of carbon dioxide surpassed 37 billion tons in 2024, demonstrating the pressing need for large-scale solutions.



“Society has already figured out how to produce billions of tons of cement per year, and cement kilns run for decades,” Kanan said. “If we use those learnings and designs, there is a clear path for how to go from lab discovery to carbon removal on a meaningful scale.”



Work is also underway to develop electric-powered kilns in collaboration with electrical engineering associate professor Jonathan Fan. 



If successful, this innovation could reduce or eliminate the carbon footprint of the heating process, further boosting the climate benefits.



By combining well-established industrial methods with a novel chemical reaction, this approach could offer a promising and relatively low-cost way to draw down billions of tons of CO2 from the atmosphere - and help mitigate the accelerating effects of climate change.



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41586-024-08499-2">Nature</a>.



Image Credit: Renhour48 via Wikimedia



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Common rocks turned into great carbon trappers with new technology

Scientists have devised an affordable way to permanently remove carbon...

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<script src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" type="text/javascript"></script></div>
 
Space Weather Week 2018 Today&#8217;s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> celebrates the fifteenth anniversary of the European Space Weather Week. 
The dynamic conditions of space, known as “space weather,” result from intense radiation and energetic material that is blasted from the Sun in every direction. 
The ESA is working to launch new solar-observing missions to provide experts with a better understanding of space weather events. 
&#8212;
By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 
Video Credit: European Space Agency

Space Weather Week 2018

News coming your way