Researchers used high-powered supercomputing techniques to simulate extreme conditions and determine the maximum amount of nitrogen in the Earth's outer core. The study provides critical insights into the planet's chemical composition and its potential impact on habitability.
Astrophysicist Wendy Panero proposes a new approach to determining a planet's habitability by analyzing its mass, radius, and star composition. This method could help scientists identify the most promising candidates for supporting life in the universe, saving time and resources.
Researchers using NASA's Hubble Space Telescope have discovered a medium-sized exoplanet, GJ 3470b, losing mass at a rate 100 times faster than similar planets. The study advances knowledge of planetary evolution and suggests that half of the planet may be gone in a few billion years.
Researchers have detected helium escaping from the atmosphere of HAT-P-11b, a planet equivalent in size to Neptune, revealing an extended cloud that is inflating the planet like a balloon. The study provides new insights into the extreme atmospheric conditions found around the hottest exoplanets.
The giant exoplanet WASP-69b carries a comet-like tail made of helium particles escaping its gravitational field propelled by ultraviolet radiation from its star. The team analyzed the planet's atmosphere using the CARMENES instrument, revealing a stronger and longer-lasting dimming of starlight in a region where helium gas absorbs light.
Researchers used neon isotopes to study Earth's mantle formation, finding evidence of rapid early planet formation and delivery of vital compounds. The findings support the idea that a planet must reach a certain size before absorbing these ingredients, which is consistent with observations of other solar systems.
The new journal explores the unbreakable bond between people and plants, highlighting its impact on societies, cultures, and ecosystems. It aims to publish emerging plant science with societal relevance, covering six themes: plant conservation, genomics applications, diversity, global change, natural assets, and their interconnections.
Scientists at the W.M. Keck Observatory have made robust data on a young giant gas planet, confirming its water composition and lack of methane. The team is perfecting their technique using advanced instrumentation to study giant planets and prepare for future searches for life on Earth-like exoplanets.
Astronomers at Carnegie Institution for Science have discovered a frozen Super-Earth orbiting Barnard's star, just six light-years from Earth. The planet has at least 3.2 times Earth's mass and orbits its star every 233 days at a distance where water would be frozen.
Astronomers have found a candidate planet, named Barnard's star b, orbiting the red dwarf star every 233 days. The cold super-Earth is estimated to be around 3.2 times the size of Earth and has a temperature of -150°C.
Astronomers have discovered a planet, known as Barnard's star b, which orbits around its host star every 233 days. The 'super-Earth' is estimated to be a frozen world with surface temperatures of -170 degrees Celsius, but could potentially become more hospitable if it has a substantial atmosphere.
Astronomers detect a super-Earth orbiting Barnard's Star, with the planet having a mass at least 3.2 times that of Earth, and orbits its host star in roughly 233 days. The exoplanet lies close to the snow line, making it inhospitable for life as we know it.
A team led by Dr Farzana Meru of the University of Warwick has developed a way to detect planet migration in protoplanetary discs using ALMA observations. By analyzing the particle size in two dust rings, astronomers can determine if a planet is migrating within the disc.
This special issue of Science presents research on Cassini's final transmissions to Earth, revealing new observations and insights into Saturn's atmosphere and rings. The studies found that water, methane, and organic-rich material fall into the planet's atmosphere, modifying its composition and structure.
Researchers found a tilt of less than 0.01 degrees in Saturn's magnetic field, contradicting the theory that it requires a significant tilt to form. The team also spotted interesting structures near the planet, including a secondary source of magnetism and electric currents flowing between the rings and the planet.
Astronomers at Columbia University have discovered a candidate exomoon orbiting a gas-giant planet 8,000 light-years away. The moon is estimated to be 1.5% the mass of its companion planet and lies within the star's habitable zone, where liquid water may exist on solid surfaces.
Astronomers have found the first compelling evidence for a moon outside our own Solar System, using data from the Hubble Space Telescope and Kepler Space Telescope. The exomoon, Kepler-1625b-i, is comparable in diameter to Neptune and orbits a gas giant planet at a distance similar to Earth's orbit around the Sun.
A team of researchers from CU Boulder has discovered that stagnant slabs, which form when oceanic plates are forced deep underground, may be caused by a thin layer of weak material at the boundary of the planet's upper and lower mantle. This discovery could change how scientists think about tectonics and volcanism on Earth's surface.
A cross-disciplinary team led by Rice University will investigate the formation of life-essential elements in rocky planets during their early evolution. The CLEVER Planets project aims to understand how these elements survive turbulent periods and ultimately lead to habitability, with a focus on rocky worlds beyond our solar system.
A new study published in Icarus challenges the International Astronomical Union's 2006 definition of a planet, which requires a celestial body to clear its orbit. Researchers argue that this standard is not supported by scientific literature and propose a new classification method based on size and gravitational dominance.
Astronomers have detected iron and titanium vapors in the atmosphere of KELT-9b, an ultra-hot Jupiter, using spectroscopy. The high temperatures break apart molecules, making these atomic species visible.
Research team proposes that ultrahot Jupiters have normal compositions, with atmospheres resembling stars due to high temperatures and radiation. Water molecules are torn apart on the dayside, but may recombine into clouds in the nightside hemispheres.
Scientists have found a new exoplanet, 2MASS 0249 c, that is nearly identical to the well-studied gas-giant planet beta Pictoris b. The two planets share similar mass, brightness, and spectrum but differ in their formation environments, with one orbiting a bright star and the other a pair of faint brown dwarfs.
Researchers used high-energy laser beams and optical sensors to observe nitrogen behavior at extreme conditions, confirming it exists as a liquid metal. The findings shed light on the fundamental nature of nitrogen and its potential role in the planet's atmosphere evolution.
New images from the Juno spacecraft reveal that Jupiter's moons Io and Ganymede cast multiple, double-wingshaped auroral footprints on their parent planet. These large lunar bodies decorate the atmosphere with unusual patterns, previously seen as a bright spot footprint of each nearby moon.
Researchers at Durham University found that a massive collision with an object twice the size of Earth likely tilted Uranus on its side. The impact may have trapped heat, explaining the planet's extremely cold temperature. Simulations also suggest this event could have formed Uranus' rings and moons.
Scientists at MIT have discovered nearly 80 new planetary candidates in the K2 dataset, including a likely planet that orbits HD 73344 every 15 days. The planet is estimated to be 2.5 times the size of Earth and 10 times as massive, with surface temperatures reaching 1,200-1,300 degrees Celsius.
Astronomers found that planets in the habitable zone can abruptly freeze due to large obliquity variations or eccentricity changes, making a fraction of them uninhabitable. The study uses sophisticated ice sheet modeling and suggests orbital dynamics play a significant role in habitability.
Researchers propose a link between the dawn of plate tectonics and the 'Snowball Earth' period, which sent the planet into a deep freeze lasting millions of years. The hypothesis suggests that the drastic climate change could be a consequence of the Earth's transition from single lid to plate tectonic activity.
Scientists have detected an exoplanet atmosphere free of clouds, marking a pivotal breakthrough in understanding planets beyond our solar system. The 'hot Saturn' WASP-96b's clear sodium signature is the result of its cloud-free atmosphere.
A University of Oklahoma astrophysics team discovered that the growth of Mars was halted by an orbital instability among the outer solar system's giant planets. The study used computer simulations to show how this instability, linked to the Nice Model, prevented Mars from becoming a larger, habitable planet like Earth.
A new study published in Earth and Planetary Science Letters estimates Mercury's crust to be 16 miles thick and denser than aluminum. This finding supports the theory that Mercury's crust formed largely through volcanic activity, shedding light on the planet's formation.
Researchers found that plasmoid reconnection in Mercury's magnetotail could accelerate energetic electrons, solving a puzzle left by previous space missions. The study also revealed that turbulence enhances reconnection, leading to improved predictions for future missions like Bepi-Colombo.
A team of UCSB physicists has created a device named DARKNESS, the first 10,000-pixel integral field spectrograph designed to overcome the limitations of traditional semiconductor detectors. This instrument enables direct imaging of planets around nearby stars and can detect fainter planets with higher contrast ratios.
Astronomers have detected an Earth-sized planet with a density similar to Mercury's, located 260 million light years away. K2-229b orbits a medium-sized active star and reaches temperatures of over 2000°C.
Researchers used NASA's Juno spacecraft data to reveal that Jupiter's colorful bands are not just surface phenomena, but significant strata extending 3,000 km deep. The analysis shows that Jupiter's atmosphere is only 1% of its total mass, a surprising discovery.
Scientists have discovered intricate storm patterns at Jupiter's poles, with eight and five storms surrounding a central cyclone in each hemisphere. This unusual arrangement challenges our understanding of atmospheric dynamics, sparking hopes for new insights into planetary weather.
The James Webb Space Telescope will study Mars' transition from wet to dry, revealing clues about the planet's past and present habitability. The telescope will also analyze the abundance of water and methane in the Martian atmosphere, shedding light on the origin of these gases.
Astronomers have discovered a trio of super-Earths around the star GJ 9827, with two of them having radii between 1.7 times and 2.5 times that of Earth, sparking debate about their composition. The study's findings provide insight into how these planets form and evolve, with implications for the search for life beyond our Solar System.
Astronomers discovered a 'hot Jupiter' with westward winds, defying theory. The planet's atmosphere may interact with its magnetic field or be affected by clouds, raising new questions about the phenomenon.
The Star-Planet Activity Research CubeSat (SPARCS) mission aims to monitor the flares and sunspots of small, cool stars, known as M dwarfs, to assess their habitability for planets. The spacecraft will use ultraviolet-sensitive detectors to study how stellar activity affects planetary environments.
A recent study published in The Astronomical Journal found that exoplanets orbiting the same star are often similar in size and have regular orbital spacing. This pattern could suggest that most planetary systems have a different formation history than our solar system.
A recent study published in Nature found that Mars' surface water was absorbed by its crust over time, leaving the planet essentially dry. The research suggests that approximately 300 meters of surface water on Mars could have been locked up in microscopic mineral structures.
Scientists propose that Martian surface reacted with water and then absorbed it, increasing rock oxidation. The planet's composition, temperature profile and iron content made the surface prone to reaction, dragging water down into the mantle.
Researchers at UNIGE detected an exoplanet with a highly inclined orbit around a red dwarf star, evading circular motion and instead following a polar path. This unusual behavior is attributed to the presence of an unknown companion planet that disturbs its path.
A study led by University of Leicester scientist Dr. Leigh Fletcher found that massive northern storms on Saturn can disrupt its equatorial atmospheric patterns, similar to those seen on Earth. The research reveals a link between distant events in a planet's climate system, known as teleconnection.
The MAVEN mission helps answer the question of how long a rocky planet might be habitable by orbiting a red dwarf star. Based on Mars' atmospheric loss data, researchers estimated that such a planet's atmosphere could lose charged particles and neutral particles at significantly higher rates.
Cassini spacecraft data reveals Saturn's rings casting shadows in ionized particles, affecting the planet's ionosphere. The dynamic ionosphere is structured on small scales and shows surprising variability, with possible explanations including ring rain, solar radiation, or magnetic field interactions.
Researchers propose a new scenario for ancient clay mineral formation on Mars, suggesting clays formed during the planet's creation from molten magma. The steamy atmosphere created by the magma ocean could have converted vast swaths of the surface to clay, leading to the widespread distribution seen today.
The oversized planet WASP-18b is wrapped in a smothering stratosphere loaded with carbon monoxide and devoid of water. The formation of this atmosphere is attributed to 'sunscreen'-like molecules absorbing UV radiation and releasing heat, which is unusual compared to other gas giants.
Researchers have discovered two super-Earths around the red dwarf star K2-18, one of which could be a scaled-up version of our own planet. The newly found planet, K2-18c, is likely too hot to support life, but its companion, K2-18b, has potential for liquid surface water and might harbor conditions suitable for life.
A study using the W. M. Keck Observatory measured the spin rates of three planetary-mass companions, finding rates similar to those of small free-floating brown dwarfs, suggesting two possibilities: the companions could be brown dwarfs or planets that formed with similar spins
The ALMA discovery reveals two dust belts surrounding Proxima Centauri, one extending four hundred million kilometres from the star and another even farther out. These findings suggest a complex planetary system with multiple planets and potentially offer insights into the formation of the Earth.
NGTS-1b, the largest planet compared to its companion star, has been discovered by an international collaboration of astronomers. The giant gas giant orbits a small star half the size of our Sun and challenges theories on planet formation.
A giant gas giant planet, NGTS-1b, has been discovered orbiting a tiny star, defying conventional formation theories. The planet's proximity to its star and short orbital period pose significant challenges for understanding the origins of such massive worlds.
Researchers use Hubble Space Telescope to find 'sunscreen snow' on hot giant planet outside solar system, where titanium dioxide condenses into clouds. The discovery sheds light on exoplanet climates and may aid in gauging Earth-size planets' habitability.
Human activities have significantly impacted the planet, changing global climate, sea levels and biosphere. The Anthropocene Working Group proposes formalizing this new epoch to acknowledge these changes.
Astronomers have discovered an exoplanet, GJ 436b, with a huge gas cloud resembling a comet's tail, caused by intense stellar irradiation. The planet's atmosphere loses hydrogen due to the star's radiation, forming a massive cloud that absorbs UV radiation.
Researchers analyzed Akatsuki data to uncover wind velocities with temporal and spatial variabilities in lower-to-middle cloud layers. The discovery of an equatorial jet near the equator has significant implications for understanding superrotation theories.
Researchers demonstrated a region of very deep contrast between a simulated star and its planet, achieving an 18% bandpass. This milestone is crucial for future missions like WFIRST to detect and analyze the atmospheres of giant planets.