Today's Image of the Day from NASA Earth Observatory features an astronaut view of Mount Nemrut, a volcano located in eastern Turkey near Lake Van.



Mount Nemrut is notable for its immense caldera, which was formed through a series of <a href="https://www.earth.com/news/volcanic-eruptions-play-an-overlooked-role-in-earths-climate/" target="_blank" rel="noreferrer noopener">eruptions</a>. The caldera, one of the largest in the world, now contains several lakes such as Lake Nemrut.&nbsp;



"The eastern half of the caldera is partially filled by solidified lava flows from past eruptions. Snow cover present at the time of this photo accentuates pressure ridges that formed as the lava was flowing and cooling," noted <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.



"These pressure ridges vary in size, thickness, and orientation due to the varying viscosity and flow direction of the lavas during eruptions."



<h2 class="wp-block-heading" id="h-formation-of-lake-nemrut">Formation of Lake Nemrut</h2>



"Lake Nemrut (Nemrut Gölü) occupies the western half of the caldera, creating a rough crescent shape that partially submerges the old lava flows," said NASA.



"This freshwater lake, reaching up to 176 meters deep, is accompanied by a smaller lake at the upper-center of the caldera."



The lake was formed after the collapse of the Nemrut volcano's summit. This collapse created a massive crater, which gradually filled with water over time, forming 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">lake</a>.



<h2 class="wp-block-heading" id="h-unesco-world-heritage-site">UNESCO World Heritage Site </h2>



Mount Nemrut and its surroundings are part of a protected UNESCO World Heritage Site due to their ecological and geological significance.



The site is home to diverse wildlife, including various bird species that use the lake as a stopover during migration. The caldera also contains smaller lakes and wetlands, adding to the area's biodiversity.



Lake Nemrut is a popular destination for tourists, hikers, and nature enthusiasts, offering stunning views of the volcanic landscape.



Despite its popularity, the lake remains relatively remote and unspoiled, contributing to its appeal as a natural wonder.



<h2 class="wp-block-heading" id="h-mount-nemrut-has-shaped-the-landscape">Mount Nemrut has shaped the landscape</h2>



Geologically, Mount Nemrut is interesting because its <a href="https://www.earth.com/news/new-research-enhances-predictions-on-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">eruptions</a> have played a key role in shaping the local landscape. 



Its last major eruption occurred around 1441 AD, which indicates that it's not currently active but is considered dormant.



The area around Nemrut is known for its geothermal activity, including hot springs and fumaroles, suggesting that there is still significant heat beneath the surface.



Over thousands of years, various civilizations have inhabited the region around Nemrut, leaving behind a wealth of archaeological sites.



<h2 class="wp-block-heading" id="h-tribute-to-a-king">Tribute to a king</h2>



The summit of Mount Nemrut is dominated by a vast funerary mound constructed by King Antiochus I Theos, who ruled the Kingdom of Commagene in the 1st century BCE. 



The site was intended to serve as his tomb sanctuary and a place to commemorate the king's vision of divine kingship and unity between Eastern and Western cultures.



The mound, made of loose crushed stones, measures about 50 meters (164 feet) in height and spans a diameter of 150 meters (492 feet), creating an imposing feature visible from afar.



Surrounding the mound are terraces on the eastern, western, and northern sides, each adorned with colossal statues and reliefs. The statues, ranging in height from 8 to 10 meters (26 to 33 feet), represent various deities, including Zeus, Apollo, Hercules, and the goddess Tyche, alongside King Antiochus himself. 



The heads of the statues, many of which have toppled over due to <a href="https://www.earth.com/news/new-map-shows-75-percent-of-the-u-s-at-risk-of-damaging-earthquakes/" target="_blank" rel="noreferrer noopener">earthquakes</a> and erosion, lie scattered around the site, creating an iconic and enigmatic scene.



<h2 class="wp-block-heading" id="h-spiritual-and-religious-practices">Spiritual and religious practices</h2>



In addition to the statues, inscriptions at Mount Nemrut provide valuable historical information about the kingdom, the king's lineage, and the religious practices of the time.



The site is not only a marvel of ancient engineering but also a spiritual and astronomical center. Scholars believe the terraces were aligned with celestial events, serving as an observatory for solstices and equinoxes.



In addition to its natural and historical significance, the Nemrut volcano has been the subject of scientific study, as researchers aim to understand more about <a href="https://www.earth.com/news/volcanic-eruptions-play-an-overlooked-role-in-earths-climate/" target="_blank" rel="noreferrer noopener">volcanic activity</a> in the region, the history of its eruptions, and the potential risks it may pose in the future.



Image Credit: NASA Earth Observatory



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Mount Nemrut: Ancient mysteries and natural marvels 

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

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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Dwarf galaxy provides a window into the early universe

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

Today's Image of the Day from the European Space Agency features massive amounts of smoke rising from multiple wildfires in Southern California&nbsp;



The largest blaze is the Palisades Fire, which ignited near the Pacific Palisades neighborhood in Los Angeles on January 7, 2025.&nbsp;



<h2 class="wp-block-heading" id="h-explosive-wildfire-conditions">Explosive wildfire conditions</h2>



The Palisades Fire spread rapidly due to severe drought conditions and strong Santa Ana winds, with gusts reaching up to 100 miles per hour.&nbsp;



Within hours, the fire expanded from 200 acres to over 2,900 acres, threatening thousands of structures and prompting mandatory evacuations for thousands of residents.



<h2 class="wp-block-heading" id="h-most-ferocious-winds-in-years">Most ferocious winds in years</h2>



A report from Fox Weather noted: “More than 260,000 people are under some sort of evacuation statement as multiple uncontained wildfires consume everything in their path.”



The news agency said that the fires are fueled by the “most ferocious Santa Ana winds in over 14 years.” The report further noted that “the level of destruction extends both north and south along the coast, with hurricane-force winds that are incredibly strong, dry, and unpredictable.”&nbsp;



As of January 8, the Palisades Fire had rapidly exploded to over 5,000 acres and remained uncontained. The cause of the fire is currently under investigation.&nbsp;



“This image captured by the Copernicus Sentinel-2 mission vividly depicts the smoke billowing from the fire near Santa Monica at 10:36 local time on January 7, 2025, not long after the fire broke out. The blaze has since caused widespread damage and concern,” noted <a href="https://www.esa.int/ESA_Multimedia/Images/2025/01/Los_Angeles_ablaze" target="_blank" rel="noreferrer noopener">ESA</a>.



<h2 class="wp-block-heading" id="h-widespread-damage-and-concern">Widespread damage and concern</h2>



The Los Angeles Fire Department (LAFD) has deployed over 1,400 firefighters to combat the blaze. However, the intense winds have hindered aerial firefighting efforts, as aircraft were grounded for safety reasons.&nbsp;



The fire has destroyed more than 1,000 structures, including several homes in Malibu, and has led to significant traffic congestion as residents evacuate the area.&nbsp;



<h2 class="wp-block-heading" id="h-warning-for-extreme-fire-behavior-nbsp">Warning for extreme fire behavior&nbsp;</h2>



On Monday, before the fires broke out, the weather service office in Los Angeles warned that wind gusts could reach 100 miles per hour in some areas this week - creating the potential for "extreme fire behavior.” 



In addition to the Palisades Fire, three other significant blazes include the Eaton Fire in the Altadena region and the Hurst Fire in northern Sylmar. These fires have prompted further evacuations and continue to threaten numerous structures.&nbsp;



"L.A. County and all 29 fire departments in our county are not prepared for this type of widespread disaster," LA County Fire Chief Anthony C. Marrone said at a news conference. "There are not enough firefighters in L.A. County to address four separate fires of this magnitude."



<h2 class="wp-block-heading" id="h-a-hurricane-of-fire">A hurricane of fire</h2>



High wind warnings and red flag warnings in effect across the region indicate that the critical fire weather conditions are ongoing.&nbsp;



Residents are advised to remain vigilant, adhere to evacuation orders, and stay informed through official channels as the situation evolves.



"Winds will not die down much until noon on Wednesday around Los Angeles," said meteorologist Ryan Maue on X. "The worst is yet to come in next few hours with 80-105 mph gusts. This is a hurricane of fire."



<h2 class="wp-block-heading" id="h-wildfires-in-southern-california-nbsp">Wildfires in Southern California&nbsp;</h2>



Wildfires in Southern California are particularly severe due to a combination of factors. The region’s hot, dry climate creates ideal conditions for fires, especially during the summer and fall when vegetation is parched.&nbsp;



Seasonal Santa Ana winds exacerbate the problem by driving flames rapidly across the landscape, making fires difficult to contain. The area's diverse and often dense vegetation, such as chaparral and grasslands, provides abundant fuel.&nbsp;



Furthermore, Southern California’s growing urban footprint increases the risk of fires igniting due to human activity, while also placing more people and infrastructure in harm’s way.&nbsp;



Climate change intensifies these challenges by extending fire seasons and increasing the frequency of extreme heat and drought events, creating a feedback loop that makes wildfires increasingly destructive.



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Image Credit: ESA&nbsp;



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Explosive wildfires in California fueled by hurricane-force winds

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. 



“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."



"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.”



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;



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



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.



“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.



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



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.



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



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.



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.



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;



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.



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



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



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. 



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.



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



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. 



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.



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



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. 



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.



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



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. 



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



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.



Image Credit: NASA Earth Observatory&nbsp;



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Pangong Lake on the Tibetan Plateau

Today's Image of the Day from NASA Earth Observatory features Ksudach, a remarkable volcanic complex located on Russia's Kamchatka Peninsula.



“The peninsula is one of the world’s most active volcanic arcs due to tectonic plate movement, with the Pacific Plate subducting under the Eurasian Plate,” noted <a href="https://earthobservatory.nasa.gov/images/153779/ksudachs-nested-calderas-and-craters" target="_blank" rel="noreferrer noopener">NASA</a>.



<h2 class="wp-block-heading" id="h-explosive-eruptions-of-ksudach">Explosive eruptions of Ksudach</h2>



Ksudach is classified as a shield <a href="https://www.earth.com/news/new-camera-helps-scientists-forecast-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">volcano</a> due to the gentle slopes formed by its extensive lava flows. The combination of its shield-like structure and the prominent caldera system makes Ksudach a unique volcanic feature on the Kamchatka Peninsula.



“Several overlapping calderas and craters comprise the volcano. Calderas are large, bowl-shaped depressions created by the collapse of overlying material into an emptied subsurface magma chamber,” explained NASA.



“Craters are circular depressions created by volcanic activity, surface impacts, or explosions.”



This volcanic system has a fascinating geological history shaped by multiple explosive eruptions.&nbsp;



The most significant of these occurred around 240 AD, leaving behind a prominent caldera that now hosts scenic crater lakes, such as Lake Ksudach. 



“Lakes within the volcanic region are primarily recharged by rain and snowmelt from the winter season. This photo shows the water’s contrasting blue hues surrounded by green vegetation,” noted NASA.



“Traces of snow fill valleys within and outside the volcano’s caldera complex. These snow-covered areas highlight the drainage patterns from higher to lower elevations. Water that flows through these erosional pathways and into the caldera supports its vegetation and lakes.”



<h2 class="wp-block-heading" id="h-unique-landscape-of-ksudach-nbsp">Unique landscape of Ksudach&nbsp;</h2>



Ksudach's landscape also features pyroclastic deposits, lava flows, and hydrothermal features like fumaroles.&nbsp;



The surrounding environment - which is part of the UNESCO-listed Kamchatka Volcanoes - supports a diverse ecosystem with unique wildlife. 



Despite its remote location, Ksudach has drawn the attention of geologists, offering insights into <a href="https://www.earth.com/news/underwater-volcanic-eruptions-are-more-harmful-than-previously-believed/" target="_blank" rel="noreferrer noopener">volcanic processes</a> and the dynamics of caldera formation.



<h2 class="wp-block-heading" id="h-dynamic-nature-of-earth-s-geology-nbsp">Dynamic nature of Earth's geology&nbsp;</h2>



The most well-documented eruption of Ksudach occurred in March 1907. This eruption ranks as one of the largest in Kamchatka in the 20th century, with a Volcanic Explosivity Index (VEI) of 5.



The eruption produced a colossal ash column that soared into the stratosphere, dispersing fine particles over vast distances and contributing to global atmospheric changes.&nbsp;



The sheer force of the <a href="https://www.earth.com/news/icelands-volcanic-eruptions-may-continue-for-decades/" target="_blank" rel="noreferrer noopener">eruption</a> unleashed pyroclastic flows - fast-moving avalanches of hot gas, ash, and volcanic debris - that raced down the volcano's slopes, obliterating everything in their path.&nbsp;



These flows, capable of reaching temperatures over 1,000°C, decimated vegetation and altered the topography of the surrounding region.&nbsp;



Simultaneously, tephra deposits blanketed the landscape in layers of thick volcanic material, smothering ecosystems and creating a barren wasteland.&nbsp;



Today, Ksudach is considered an active <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">volcano</a> but remains dormant. The region is closely monitored due to its potential for renewed <a href="https://www.earth.com/news/new-research-enhances-predictions-on-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">activity</a>.



<h2 class="wp-block-heading" id="h-pacific-ring-of-fire-nbsp">Pacific Ring of Fire&nbsp;</h2>



The Kamchatka Peninsula lies along the Pacific Ring of Fire, a horseshoe-shaped zone encircling the Pacific Ocean where tectonic activity is highly concentrated.&nbsp;



This geologically dynamic area features numerous volcanoes, hot springs, geysers, and frequent seismic activity - making it a hotspot for both natural beauty and scientific study. 



Kamchatka is home to over 160 volcanoes, with about 30 considered active, including Klyuchevskaya Sopka, the highest and one of the most active in the region.



<h3 class="wp-block-heading" id="h-volcanic-activity-nbsp">Volcanic activity&nbsp;</h3>



As the Pacific Plate dives into the Earth's mantle, it melts and generates magma that feeds Kamchatka’s volcanic systems.&nbsp;



This ongoing tectonic interaction also contributes to the broader activity of the Pacific Ring of Fire, which accounts for approximately 75% of the world's active and dormant <a href="https://www.earth.com/news/supervolcano-italy-solfatara-crater-phlegraean-fields-shows-signs-of-waking-up/" target="_blank" rel="noreferrer noopener">volcanoes</a> and about 90% of its earthquakes.



<h3 class="wp-block-heading" id="h-broader-significance-nbsp">Broader significance&nbsp;</h3>



Beyond its geological significance, the Kamchatka Peninsula boasts a diverse ecosystem that is home to animals such as snow sheep, brown bears, red foxes, and unique plants that are adapted to its harsh environment. 



The coastal waters surrounding the peninsula support various fish species, including abundant salmon, as well as sea lions and killer whales.



The interplay of volcanic landscapes and pristine wilderness makes it a natural laboratory for understanding Earth's dynamic processes.



The image was captured by an astronaut aboard the International Space Station.



Image Credit: NASA Earth Observatory&nbsp;



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Ksudach: A volcano shaped by explosive forces

Out of all the planets in our solar system beyond Earth, most consider Saturn's beauty to be the most spectacular, with a set of rings that have inspired curiosity for hundreds of years. 



In the 17th century, Italian astronomer Galileo Galilei described this distant world as having "ears," showing how limited his view was at the time. 



Even with basic tools, he sensed something unusual about the planet’s appearance, although he could not fully explain it.



<h2 class="wp-block-heading" id="h-saturn-s-rings-steal-the-show">Saturn's rings steal the show</h2>



Modern telescopes and worldwide observatories have transformed our <a href="https://www.earth.com/news/massive-energy-imbalance-discovered-on-saturn/" target="_blank" rel="noreferrer noopener">understanding of Saturn</a>. They reveal swirling collections of ice and rocks orbiting the massive planet in broad arcs that we call rings. 



These ribbons of debris are more than a mere celestial decoration for us humans to admire; they shed light on the gravitational forces at work in our solar system.



By studying Saturn's rings, astronomers gain a better understanding of how cosmic particles behave when bound by gravity, and why their appearance changes when viewed from Earth. 



Jonah Peter, a doctoral student at Harvard-Smithsonian Center for Astrophysics (<a href="https://www.cfa.harvard.edu/" target="_blank" rel="noreferrer noopener">CfA</a>), has focused on how Saturn’s moons affect the <a href="https://www.earth.com/news/new-image-of-saturn-and-its-ring-spokes-from-the-hubble-space-telescope/" target="_blank" rel="noreferrer noopener">ring environment</a>.



His work connects the motions of this ring material to the broader story of our cosmic neighborhood, all of which is driven by a process known as orbital mechanics, or celestial mechanics. 



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



Orbital mechanics describes how bodies move under the pull of gravity. Planets circle the Sun, moons circle planets, and satellites stay in orbit around Earth. 



These paths depend on factors like velocity and orbital shape, all of which keep objects traveling in predictable loops.



Saturn’s tilt plays a role in how we see the rings. As the planet continues on its journey, our viewpoint changes over time. 



In some phases, the rings show off their full width. In others, they line up edge-on, turning into a thin band that seems ready to vanish.



<h2 class="wp-block-heading" id="h-how-saturn-s-rings-will-disappear">How Saturn's rings will disappear</h2>



A striking event called a "ring plane crossing" will occur on March 23, 2025. The rings will appear to have completely vanished because their thin edges will be aimed at Earth. 



This alignment happens when Saturn’s tilt and location match up so that we no longer see the bright swath of particles head-on. Once the rings vanish from easy sight in March 2025, Saturn will look like a pale yellow sphere through most telescopes. A subtle line may be visible around the planet’s middle, but only through the most powerful telescopes.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/01/saturn_rings_viewed-from-earth_orbital-mechanics_nasa_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/01/saturn_rings_viewed-from-earth_orbital-mechanics_nasa_1s.webp" alt="Rings A, B, C. You notice a large gap between the A and B rings. This is called the &quot;Cassini division&quot;. (See attached picture, where I've labeled the A, B, and C rings, along with the Cassini division.) There are other gaps in the rings at other places, but this one is the largest. the Cassini division (Hubble Space Telescope picture). Credit: NASA" class="wp-image-1956187"/></a><figcaption class="wp-element-caption">Rings A, B, C. You notice a large gap between the A and B rings. This is called the "Cassini division". (See attached picture, where I've labeled the A, B, and C rings, along with the Cassini division.) There are other gaps in the rings at other places, but this one is the largest. the Cassini division (Hubble Space Telescope picture). Credit: NASA</figcaption></figure>



Some enthusiasts might miss the typical glow, yet there is a certain thrill in waiting for that grand display to reappear.



As Earth and Saturn shift positions, the rings will come back into full view around November 2025. The planet’s looping debris will stand out again, along with glimpses of its many moons. 



<a href="https://www.earth.com/news/megastorms-on-saturn-are-larger-than-the-earth-and-last-for-hundreds-of-years/" target="_blank" rel="noreferrer noopener">This recurring pattern</a> reminds observers that our perspective can change, even when Saturn itself remains the same majestic world it has always been.



<h2 class="wp-block-heading" id="h-composition-and-structure-of-saturn-s-rings">Composition and structure of Saturn's rings</h2>



The rings are <a href="https://www.earth.com/news/saturns-rings-may-have-formed-after-two-icy-moons-collided/" target="_blank" rel="noreferrer noopener">divided into sections</a> called the A, B, and C rings, plus a few fainter ones labeled D, E, F, and G. Between the A and B rings lies the Cassini Division, measuring around 2,982 miles wide. 



Scientists note that spaces like this can form when orbital motions and gravitational tugs clear out certain pathways.



These rings are not solid sheets. They're made of pieces that range from dust-size grains to lumps as large as buses. 



Some researchers think the rings sprang from a moon ripped apart by Saturn’s gravity. Others propose that leftover material from the planet’s formation helped craft <a href="https://www.earth.com/news/we-now-know-the-age-of-saturns-rings-and-the-number-might-surprise-you/" target="_blank" rel="noreferrer noopener">these looping bands</a> more than four billion years ago.



<h2 class="wp-block-heading" id="h-moons-and-their-gravitational-pull">Moons and their gravitational pull</h2>



Saturn hosts <a href="https://www.earth.com/news/saturn-now-leads-the-solar-system-moon-race-with-145/" target="_blank" rel="noreferrer noopener">at least 145 moons</a>. Some are called shepherd moons, and they drift near the ring edges. 



Their gravity holds ring particles in place, preventing them from scattering too far in one direction or another. This process helps the rings maintain their recognizable gaps and bands.



Beyond those shepherds, Saturn’s system includes larger bodies that have unique properties. <a href="https://www.earth.com/news/saturns-moon-titan-has-shorelines-shaped-by-waves/" target="_blank" rel="noreferrer noopener">The biggest, Titan</a>, is a place of ongoing study. It has an atmosphere mostly made of nitrogen. 



Scientists have also measured a magnetic field around Titan that, while weaker than Jupiter’s, surpasses Earth’s field in relative strength.



<h2 class="wp-block-heading" id="h-titan-and-the-dragonfly">Titan and the Dragonfly</h2>



<a href="https://www.earth.com/news/dragonfly-space-mission-saturn-moon-titan-gets-greenlight/" target="_blank" rel="noreferrer noopener">NASA’s Dragonfly mission</a> plans to send an exploratory craft to Titan. Researchers are keen to learn more about its lakes of liquid hydrocarbons and the thick orange haze that hides much of its surface. 



These features hint at a landscape shaped by chemistry unlike anything on our planet.



Radio signals from Titan indicate bright auroras at the poles. These signals prove that electric and magnetic forces act in that moon’s environment. 



This unusual blend of ingredients prompts questions about how life might appear elsewhere, if it appears at all.



<h2 class="wp-block-heading" id="h-enceladus-may-harbor-life">Enceladus may harbor life</h2>



<a href="https://www.earth.com/news/life-on-saturns-moon-enceladus-massive-water-plume-has-scientists-wondering/" target="_blank" rel="noreferrer noopener">Enceladus</a>, another of Saturn’s moons, has drawn attention because of icy plumes venting from near its south pole. 



Observations from the Cassini mission revealed water vapor and possible chemical building blocks for living organisms. 



That discovery turned Enceladus into a point of interest for people searching for life in the solar system.



"Not only does Enceladus seem to meet the basic <a href="https://www.earth.com/news/life-sparking-energy-source-found-on-saturns-moon-enceladus/" target="_blank" rel="noreferrer noopener">requirements for habitability</a>, we now have an idea about how complex biomolecules could form there, and what sort of chemical pathways might be involved," explains Jonah Peter. These findings stir hope about discovering microbial life beyond Earth.



<h2 class="wp-block-heading" id="h-saturn-s-mystery-and-majesty">Saturn's mystery and majesty</h2>



Galileo’s old remark about Saturn’s "ears" underscores how far we have come. Early astronomers had limited tools, yet they still glimpsed something remarkable. 



Modern instruments add detail, but the sense of wonder remains. Saturn shows how our solar system is filled with surprises that motivate fresh discoveries.



As amateurs and experts keep pointing their lenses skyward, they continue to find reasons to appreciate this planet’s evolving appearance. 



The rings may fade from view temporarily, but people know they will return. Each phase allows us to learn a little more about how cosmic objects behave and how life might emerge under new conditions.



The full study was published in the journal <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2023JE008236" target="_blank" rel="noreferrer noopener">JGR Planets</a>.



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Saturn's majestic rings will vanish in less than three months from now

Out of all the planets in our solar system beyond...

Researchers have identified a fascinating six-planet system that offers a different take on planetary configurations. The newly <a href="https://www.nature.com/articles/s41586-023-06692-3" target="_blank" rel="noreferrer noopener">reported</a> configuration features six planets around a single star. Their orbits line up in a synchronized manner, which astronomers call resonance.



When <a href="https://www.earth.com/news/how-planets-form-its-much-more-complicated-than-we-thought/" target="_blank" rel="noreferrer noopener">planets</a> move in resonance, their orbital periods stay in a fixed ratio for millions or even billions of years. This pattern can be so exact that it reminds some observers of musical tempos. 



Spotting this kind of rhythmic harmony helps scientists figure out why some stars gather families of planets that have stood the test of time.



The analysis was led by <a href="https://astro.uchicago.edu/people/rafael-luque.php" target="_blank" rel="noreferrer noopener">Rafael Luque</a> from the University of Chicago.



<h2 class="wp-block-heading" id="h-rare-six-planet-system">Rare six-planet system</h2>



Known as HD110067, this star sits approximately 100 light-years away in the northern constellation of <a href="https://noirlab.edu/public/education/constellations/comaberenices/" target="_blank" rel="noreferrer noopener">Coma Berenices</a>.



Astronomers first recognized unusual dips in the star’s brightness when NASA’s Transiting Exoplanet Survey Satellite (<a href="https://science.nasa.gov/mission/tess/" target="_blank" rel="noreferrer noopener">TESS</a>) started surveying that region.&nbsp;



Each tiny dip hinted that one of the star’s planets was crossing its face. Data from both TESS and the European Space Agency’s CHaracterizing ExOPlanet Satellite (<a href="https://www.esa.int/Science_Exploration/Space_Science/Cheops" target="_blank" rel="noreferrer noopener">Cheops</a>) revealed something rare: a neat chain of six sub-Neptune planets in close orbits. 



“This discovery is going to become a <a href="https://www.earth.com/news/vega-star-system-discovery-forces-us-to-rethink-planet-formation/" target="_blank" rel="noreferrer noopener">benchmark system</a> to study how <a href="https://www.earth.com/news/neptune-like-exoplanets-atmospheres-interesting-earth-size-neighbors/" target="_blank" rel="noreferrer noopener">sub-Neptunes</a>, the most common type of planets outside of the solar system, form, evolve, what are they made of, and if they possess the right conditions to support the existence of liquid water in their surfaces,” remarked Luque.



<h2 class="wp-block-heading" id="h-understanding-sub-neptunes">Understanding sub-Neptunes</h2>



Many stars in our galaxy hold at least one planet that’s bigger than Earth but smaller than Neptune. These in-between worlds are often called sub-Neptunes, and they’re more plentiful than massive gas giants like Jupiter. 



Scientists are intrigued by this <a href="https://www.earth.com/news/newborn-planet-is-still-glowing-from-the-heat-of-its-formation/" target="_blank" rel="noreferrer noopener">class of planet</a> because it covers a range of possible compositions. Some might hold thick, gas envelopes, while others could have dense, rocky surfaces.



Observing these in sync can show how these planets get locked in place and remain that way for an incredibly long span of time.



<h2 class="wp-block-heading" id="h-choreography-of-this-planetary-system">Choreography of this planetary system</h2>



Resonant systems form when <a href="https://www.earth.com/news/rare-six-planet-star-system-moves-in-strange-perfect-synchrony/" target="_blank" rel="noreferrer noopener">planets start out with orbits</a> that nudge each other in a balanced way. Small gravitational pulls set up a regular rhythm. But big objects or random gravitational jostling can break these patterns. 



That makes resonance a tricky arrangement to maintain. Astronomers <a href="https://www.nature.com/articles/s41586-023-06692-3" target="_blank" rel="noreferrer noopener">estimate</a> that only about one percent of multi-planet systems preserve this stable <a href="https://exoplanets.nasa.gov/news/1771/discovery-alert-watch-the-synchronized-dance-of-a-6-planet-system/" target="_blank" rel="noreferrer noopener">choreography</a>. 



Not all stars are lucky enough to keep their planetary brood free of turbulence. Some lose this delicate pattern when a larger planet barges in or when stars drift near one another.&nbsp;



The lack of large neighbors in HD110067’s environment might have helped these six sub-Neptunes remain nestled in their precise arrangement for so long.&nbsp;



Without any violent intrusions, the orbits can carry on as they have since formation. This level of cooperation in one system could provide hints about how others might form or break apart.



<h2 class="wp-block-heading" id="h-why-does-this-six-planet-system-matter">Why does this six-planet system matter?</h2>



For experts who study planet formation, every new system that shows a clear pattern provides more <a href="https://www.science.org/doi/10.1126/science.1194854" target="_blank" rel="noreferrer noopener">evidence</a> about how dust and gas swirl together and eventually become planets.



Some calculations suggest planets might typically start in resonance, but migration and collisions can make them drift. 



An untouched system paints a cleaner picture of early planet-building. Pinpointing each planet’s mass and density can also highlight the proportions of rocky materials, water, and gas they contain.



Researchers plan to keep a close eye on HD110067’s planets using more precise techniques. Improving measurements of the planets’ masses and densities will help astronomers to figure out what these sub-Neptunes look like on the inside.



Deeper analysis can also show whether any might have conditions that allow water to stick around on the surface. These tasks will probably involve instruments on large ground-based telescopes and future space observatories.



Astronomers hope the data from this oddly balanced system will reveal reasons why some worlds remain in tight-knit formation, while others never stabilize.



<h2 class="wp-block-heading" id="h-a-puzzle-worth-solving">A puzzle worth solving</h2>



Stumbling upon a collection of planets that circle in smooth synchronization gives a glimpse into the hidden patterns that <a href="https://www.earth.com/news/ancient-stars-shakti-shiva-shaped-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">shape the galaxy</a>.



This compact group orbiting HD110067 might be just one example of what sub-Neptunes can do when left undisturbed.&nbsp;



Folks who are fascinated by the way planetary families and planet systems form see this system as a chance to learn. 



It challenges scientists to look for other hidden resonances in our galaxy and sparks the question of how many have slipped past our detection.



The full research paper was published in the journal <a href="https://www.nature.com/articles/s41586-023-06692-3" target="_blank" rel="noreferrer noopener">Nature</a>.



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Six-planet system discovered that moves in perfect mathematical harmony

Researchers have identified a fascinating six-planet system that offers a...

California has become a vivid example of a global phenomenon known as “hydroclimate whiplash,” which involves sudden and dramatic swings between extreme wet and dry conditions.&nbsp;



These abrupt shifts are increasingly destabilizing ecosystems and communities, as shown in a new study published in <a href="https://www.nature.com/articles/s43017-024-00624-z" target="_blank" rel="noreferrer noopener">Nature Reviews Earth and Environment</a>.&nbsp;



The research highlights how climate change is intensifying these weather patterns and their associated risks, from destructive wildfires to devastating <a href="https://www.earth.com/news/flood-fatalities-experts-reveal-the-hidden-health-impacts/" target="_blank" rel="noreferrer noopener">floods</a>.



<h2 class="wp-block-heading" id="h-a-state-in-constant-flux">A state in constant flux</h2>



The winters of 2022-23 and 2023-24 brought California unprecedented precipitation, fueled by dozens of atmospheric rivers.&nbsp;



Mountain towns were buried under snow, valleys were inundated with rain and snowmelt, and landslides occurred across the state.&nbsp;



However, these deluges were followed by record summer heat and a drought-ridden start to the 2025 rainy season. The resulting dry vegetation has provided ample fuel for a series of wildfires.



“This whiplash sequence in California has increased fire risk twofold,” explained lead author Daniel Swain, a climate scientist at the University of California, Los Angeles (UCLA) and UC Agriculture and Natural Resources.&nbsp;



“First, by greatly increasing the growth of flammable grass and brush in the months leading up to fire season, and then by drying it out to exceptionally high levels with the extreme dryness and warmth that followed.”



<h2 class="wp-block-heading" id="h-global-trends-in-climate-whiplash">Global trends in climate whiplash</h2>



California's situation mirrors a global trend. The study found that hydroclimate whiplash has increased worldwide by 31% to 66% since the mid-20th century - outpacing predictions made by climate models.&nbsp;



The trend is accelerating due to human-driven <a href="https://www.earth.com/news/climate-change-earth-energy-imbalance-temperature-rise/" target="_blank" rel="noreferrer noopener">climate change</a>, with projections suggesting that whiplash events could more than double if global temperatures rise by three degrees Celsius above pre-industrial levels.



A key driver of this intensification is the “expanding atmospheric sponge,” a phenomenon in which a warmer atmosphere absorbs and releases more water.&nbsp;



For every degree Celsius of warming, the atmosphere’s capacity to hold moisture increases by 7%, compounding the severity of both <a href="https://www.earth.com/news/climate-change-is-now-the-driving-force-behind-droughts/" target="_blank" rel="noreferrer noopener">droughts</a> and floods.



“The problem is that the sponge grows exponentially, like compound interest in a bank,” Swain said. “The rate of expansion increases with each fraction of a degree of warming.”



<h2 class="wp-block-heading" id="h-beyond-rainfall-the-role-of-evaporation">Beyond rainfall: The role of evaporation</h2>



While many studies focus solely on precipitation patterns, this research emphasizes the role of increasing “evaporative demand.”&nbsp;



A warming atmosphere pulls more moisture from plants and soil, exacerbating drought conditions even when rainfall does not decrease.



“The expanding atmospheric sponge effect may offer a unifying explanation for some of the most visible, visceral impacts of climate change,” Swain noted.&nbsp;



This includes the rapid transitions between floods and droughts, landslides triggered by oversaturated soil, and cycles of vegetation growth and fire.



<h2 class="wp-block-heading" id="h-challenges-for-water-management">Challenges for water management</h2>



The intensifying hydroclimate whiplash poses significant challenges for water resource management.&nbsp;



California’s traditional strategies, such as diverting flood waters to the ocean, need to be balanced with measures to retain water for prolonged dry spells. Swain emphasized the importance of a “co-management” approach that considers drought and flood risks together.



John Abatzoglou, a UC Merced climate scientist and co-author of the study, highlighted the strain on California’s infrastructure:&nbsp;



“Hydroclimate in California is reliably unreliable. Swings like we saw a couple years ago, going from one of the driest three-year periods in a century to the once-in-a-lifetime spring 2023 snowpack, both tested our water-infrastructure systems and furthered conversations about flood water management to ensure future water security in an increasingly variable hydroclimate.”



<h2 class="wp-block-heading" id="h-global-phenomenon-of-climate-whiplash-nbsp">Global phenomenon of climate whiplash&nbsp;</h2>



While California offers a stark example, hydroclimate whiplash is a global issue. 



Regions such as northern Africa, South Asia, and the tropical Pacific are projected to experience the most dramatic increases, but almost every region will face growing risks.



“Increasing hydroclimate whiplash may turn out to be one of the more universal global changes on a warming Earth,” Swain said.



<h2 class="wp-block-heading" id="h-southern-california-fire-season-s-extended-grip">Southern California: Fire season’s extended grip</h2>



Southern California’s <a href="https://www.earth.com/news/experts-have-identified-the-key-driver-of-severe-wildfires-in-canada/" target="_blank" rel="noreferrer noopener">wildfire</a> risks have been amplified by the lack of rain and the dry vegetation left behind by previous wet seasons.&nbsp;



While seasonal winds, such as the Santa Anas, play a role in spreading fires, Swain noted that “climate change is increasing the overlap between extremely dry vegetation conditions later in the season and the occurrence of these wind events.”&nbsp;



“This, ultimately, is the key climate change connection to Southern California wildfires.”



<h2 class="wp-block-heading" id="h-slowing-the-intensification-of-climate-whiplash">Slowing the intensification of climate whiplash</h2>



The study highlights the urgent need to reduce global warming to slow the intensification of hydroclimate whiplash.&nbsp;



“The less warming there is, the less of an increase in hydroclimate whiplash we’re going to see,” Swain said.&nbsp; However, with the planet on track for two to three degrees Celsius of warming this century, substantial increases in variability are likely.



Adapting to these changes will require rethinking water management, infrastructure, and conservation strategies. By addressing both ends of the water spectrum - flood and drought - policymakers and communities can better prepare for the challenges of a warming world.



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"Hydroclimate whiplash" is wreaking havoc across the U.S.

California has become a vivid example of a global phenomenon...

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Today’s Video of the Day from the <a href="https://www.sandersinstitute.com/">The Sanders Institute</a> addresses the question of what individuals can do to help fight climate change. 
Author and environmentalist Bill McKibben, who is also a Founding Fellow of the Sanders Institute, explains that this is a great question to be asked considering that the climate crisis is such a huge problem.
McKibben says, “The biggest thing an individual can do is become&#8230;a little less of an individual.”
By joining with others to form large movements, we can all help to push for changes that will make a difference.
A good place to start is to join the Rise for Climate global day of action on September 8, 2018. You can look for an event near you at <a href="https://riseforclimate.org/">riseforclimate.org</a>.
&#8212;
By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

How can you help fight climate change?