Articles tagged with Exoplanets
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Researchers have modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune, finding evidence for a thick, hot atmosphere. The study suggests that the planet is unlikely to be habitable, but offers insights into alternative paths of planetary origins and evolution.
A recent study by ETH Zurich researchers suggests that if scientists examine 40–80 planets and find no signs of life, they can confidently conclude that fewer than 10–20% of similar planets harbor life. This finding would enable scientists to put a meaningful upper limit on the prevalence of life in the universe.
Researchers estimate that detecting no signs of life on 40-80 exoplanets would allow for an upper limit on the prevalence of life in the universe. However, uncertainties and biases in individual observations must be carefully considered to ensure reliable results.
Arizona State University welcomes two new 51 Pegasi b Fellows, Matthew Nixon and Sagnick Mukherjee, to its exoplanet research team. The fellows will pursue independent research focusing on sub-Neptune planets, atmospheres, and theoretical models. ASU's leadership in exoplanet science positions the university as a hub for early-career t...
Researchers used TESS data to identify close-in sub-Neptunes and found that their frequency changes over time, suggesting a combination of processes shaping their formation and evolution. The study provides clues about the properties of these planets and addresses long-standing questions about their origins.
The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system. The observations suggest that four giant planets formed like Jupiter and Saturn by slowly building solid cores, providing strong evidence for core accretion as their formation model.
The discovery of two exoplanets around TOI-1453, a star about 250 light years away, reveals insights into planetary configuration and formation. The super-Earth and sub-Neptune present an interesting contrast in their characteristics, with the sub-Neptune exhibiting unusually low mass and density.
Researchers identify methyl halides as a potential sign of microbial life on Hycean planets with thick hydrogen atmospheres. The gas could accumulate in exoplanet atmospheres and be detectable from light-years away, offering an optimal strategy for the search for extraterrestrial life.
Using advanced simulations, researchers Sho Shibata and Andre Izidoro suggest that super-Earths and mini-Neptunes form from distinct rings of planetesimals, providing fresh insight into planetary evolution. Their model replicates key features of exoplanetary systems, including the radius valley and 'peas-in-a-pod' pattern.
Astronomers have found solid evidence for four tiny planets circling Barnard's Star, with masses only 20-30% that of Earth. The discovery was made using the MAROON-X instrument and confirms previous hints from another study.
A team of astronomers has discovered four mini-Earth exoplanets around Barnard's Star, the nearest single star to Earth. The exoplanets are rocky and orbit their home star in a matter of days, with one being the least massive planet discovered using radial velocity technique.
New research reveals that exoplanets with masses similar to Jupiter formed much sooner than previously thought, suggesting the accretion process takes place early. This finding could lead scientists to re-evaluate and revamp their theories of planet formation for the solar system and elsewhere.
Researchers from UNSW Sydney have discovered a potential new exoplanet using the transit timing variation method. The new planet is estimated to be 10-16 times the size of Earth and orbits its star in under 16 days.
The Magellan Adaptive Optics Xtreme (MagAO-X) instrument observed two young planets orbiting PDS 70, revealing compact rings of dust and startling changes in brightness. The team believes these features are telltale signs of the planet's turbulent youth.
Astronomers are using the James Webb Space Telescope and high-performance computers to study the atmospheres of seven planets beyond our solar system, gaining insights into planetary formation and evolution. The KRONOS program aims to understand how planets form, evolve, and potentially harbor life.
A new collaboration between ASU, MSU, and LLNL aims to answer the question of how planets form by analyzing the atmospheres of seven young exoplanets. The team will use the James Webb Space Telescope and powerful computers to create atmospheric models that can reveal insights into planetary formation and evolution.
Researchers discovered reflective clouds on the western hemisphere of LTT 9779 b, a rare 'ultra-hot Neptune,' creating a striking contrast to its hotter eastern side. The team's findings reveal a delicate balance between intense heat from the star and the planet's ability to redistribute energy.
A team of researchers used JWST to study the exotic atmosphere of LTT 9779 b, revealing reflective clouds on its cooler western hemisphere. The planet's asymmetrical dayside reflectivity is driven by powerful winds that transport heat and cloud formation.
The University of Michigan Department of Astronomy will launch its first space mission in 2029 with a $10 million NASA grant. The STARI mission aims to demonstrate a new technique for studying exoplanets, which could help search for life beyond our solar system.
Astronomers have mapped the 3D structure of an exoplanet's atmosphere for the first time, revealing a unique climate with powerful winds carrying chemical elements like iron and titanium. The discovery opens the door for detailed studies of alien worlds' weather patterns.
Scientists have discovered a scrawny star and its fast-moving super-Neptune world, which sets a new record for the fastest exoplanet system. The planetary system is thought to move at least 1.2 million miles per hour.
A new study found that hotter and colder regions on a star's surface can distort our interpretations of planets, particularly when looking at dips in starlight. This distortion can lead to misinterpretation of features such as planet size, temperature, and atmospheric composition.
The team used observations from NEID and two other spectrographs to confirm one system hosting a giant planet and another with a brown dwarf. Gaia-4b has an orbital period of 570 days, mass of 12 Jupiter masses, and orbits a star 64% the mass of the Sun.
Two new celestial objects have been confirmed using Gaia data, including a Super-Jupiter exoplanet and a brown dwarf. The discovery challenges current theories of planet formation and provides valuable data for understanding these intriguing objects. Gaia's ongoing mission will uncover hundreds of planets and brown dwarfs around nearby...
Astronomers detect a super-Earth in an eccentric orbit, oscillating between habitable and non-habitable zones. The discovery provides a laboratory for testing new hypotheses on the search for life beyond Earth.
Astronomers have detected powerful jetstream winds on the equator of WASP-127b, a giant gas planet located 500 light-years from Earth. The winds reach nearly six times the speed at which the planet rotates, making them the fastest wind ever measured in a jetstream.
The completion of NASA's Pandora spacecraft bus brings the exoplanet mission one step closer to launch, set to study at least 20 planets' atmospheres for hazes, clouds, and water. The mission will utilize a novel telescope design to capture stellar surfaces and cleanly separate star and planetary signals.
A new type of exoplanet, similar to 'Super-Venus', has been detected by the James Webb Space Telescope. The planet's atmosphere is characterized by high concentrations of carbon dioxide, unlike typical Earth-like rocky planets or Neptune-like icy worlds.
Researchers have discovered a mismatched composition of gases in the planet's atmosphere compared to gases within the disk. The study found that the ratio of carbon and oxygen gases in the planet is much lower than expected, suggesting that current models of planet formation may be too simplified.
A new study using the James Webb Space Telescope has reevaluated the atmospheric composition of Trappist-1 b, finding conditions that could support a thick CO2-rich atmosphere. Researchers propose that haze from hydrocarbon compounds in the upper atmosphere may explain this scenario.
A new detection method has been used to identify over 100 small asteroids in the main asteroid belt, ranging from bus-sized to stadium-wide. This breakthrough could aid in tracking potential asteroid impactors and provide insights into meteorite origins.
Researchers used rare data from a 2012 Venus solar transit to validate techniques for studying small exoplanets' atmospheres, similar to that of Venus. The study reveals signs of carbon dioxide in the Venusian atmosphere, which can be used to differentiate it from Earth's atmosphere.
Astronomers have discovered a fourth planet in the unusual Kepler-51 system, which consists of three ultra-low density 'super-puff' planets. The new planet, Kepler-51e, has a mass similar to the other three and follows a circular orbit of approximately 264 days.
A team of astronomers from the University of Cambridge found that Venus' interior is too dry for liquid water to have existed on its surface. This conclusion challenges long-held theories and has implications for understanding Earth's uniqueness and searching for life elsewhere in the Solar System.
Researchers at Cornell University have developed a library of basalt-based spectral signatures to help identify the presence of water on exoplanets. By analyzing small spectral differences between basalt samples, scientists can determine if an exoplanet once had running surface water or water in its interior.
The discovery of K2-360 b, an ultra-short period planet with a density similar to lead, reveals clues about its formation. An outer companion, K2-360 c, may have played a crucial role in the system's development through high-eccentricity migration.
A University of Washington-led study suggests that rocky planets orbiting M-dwarf stars can maintain stable atmospheres over time, enhancing the chances of supporting life. The James Webb Space Telescope has observed hotter planets without significant atmospheres, but temperate planets in the 'Goldilocks zone' may have stable atmospheres.
Astronomers at Caltech have discovered that the well-studied brown dwarf Gliese 229B is actually a pair of tightly orbiting brown dwarfs weighing about 38 and 34 times the mass of Jupiter. This resolves the long-standing mystery about its dimness.
Astronomers used the combined perspective of Hubble and New Horizons to study the atmosphere of Uranus, a proxy for similar planets beyond our solar system. The results suggest that exoplanets may be dimmer than predicted at partial phases, offering new clues to their potential habitability.
A team of astronomers discovered new insights into the forces that shape protoplanetary disks using the James Webb Space Telescope. They traced disk winds in unprecedented detail, revealing an intricate structure and a pronounced central hole inside each cone-shaped envelope of winds.
Astronomers have discovered an exoplanet orbiting Barnard's star, located six light-years away, which has at least half the mass of Venus and orbits its star in just over three Earth days. The discovery was made using ESO's VLT and confirms the existence of a new exoplanet candidate, while also hinting at the presence of three more.
Researchers from University of Texas at Arlington have identified 206 systems of interest for potential habitability, including one system where the planet is always situated in the HZ. The team analyzed data from NASA Exoplanet Archive and found F-type stars to be a promising case for life beyond Earth.
A team of astronomers discovered a planetary system that resembles the sun-Earth system, with an Earth-size companion in an orbit twice as large as Earth's today. The discovery provides insight into the evolution of main sequence stars and their impact on planets.
Researchers have discovered a new area called the 'Neptunian Ridge', which separates a desert of rare, radiation-eroded planets from a more populated savannah. The ridge is thought to be the result of high-eccentricity tidal migration, shaping the geography of exoplanet landscapes.
Researchers have observed a uniquely inflated and asymmetric exoplanet called WASP-107b using the James Webb Space Telescope. The exoplanet has an east-west asymmetry in its atmosphere, which may help scientists understand its climate and atmospheric dynamics.
Researchers have developed a method using physics-informed neural networks to model the complex light scattering in exoplanet atmospheres. This breakthrough enables more accurate analysis of exoplanet atmospheres, particularly with regard to cloud influence and chemical composition.
A research team at Lund University has discovered a small exoplanet, TOI-1408c, with an unusual orbital motion that deviates from predicted behavior. The planet's interactions with its star and other planets offer insights into the complexity of planetary system formation.
Drs Johanna Vos aims to better understand weather patterns on extrasolar worlds using the James Webb Space Telescope. Her Exo-PEA project will reveal dominant atmospheric processes governing giant world weather, expanding our understanding of planetary atmospheres.
Researchers at Georgia State University have developed a new approach to finding life beyond Earth by focusing on the most abundant type of star in the universe: M dwarfs. With their vast resources and potential for habitable planets, M dwarfs offer the best chance for scientists to discover life-supporting exoplanets.
The James Webb Space Telescope has identified six likely rogue worlds, including the lightest ever found with a dusty disk around it. These objects offer insights into how stars and planets form, suggesting that gas giants can form in disks around young stars.
Researchers found that as planet mass increases, water tends to integrate with the iron core, leading to a reevaluation of astronomical observation data and planetary habitability. This discovery has significant implications for the study of Super-Earths and the search for life beyond Earth.
The Ariel Data Challenge 2024 aims to extract faint exoplanetary signals from noisy space telescope observations, with a focus on overcoming noise sources like 'jitter noise'. The competition offers a unique chance for data scientists and AI enthusiasts to contribute to cutting-edge research in exoplanet atmospheres.
Astronomers have imaged the coldest exoplanet ever detected using JWST, which agrees with models of planet evolution and solar system ages. The exoplanet orbits a super-Jupiter in the Epsilon Indi triple star system and has a mass six times that of Jupiter.
Astronomers have directly imaged the coldest exoplanet, Epsilon Indi Ab, using NASA's James Webb Space Telescope. The planet is around 2 degrees Celsius colder than previously imaged planets, providing a rare opportunity to study its atmospheric composition.
A new study by Rice University's David Alexander and Anthony Atkinson extends the definition of a habitable zone for planets to include their star's magnetic field. Only two exoplanets, K2-3 d and Kepler-186 f, meet all conditions for potential habitability, suggesting that stellar magnetism is a crucial factor in determining planetary...
A team of astronomers has successfully detected evidence of water vapor in the atmosphere of a scorching hot Saturn, HD 149026 b. This finding is significant because it challenges the conventional wisdom that such extreme environments should not support liquid water.
The European Space Agency's PLATO mission aims to find nearby potentially habitable worlds around Sun-like stars. The space telescope will blast into orbit in December 2026 and study the stars using a range of techniques, including asteroseismology, to work out their masses, radii, and ages.
Astronomers at MIT and Penn State have discovered a new 'progenitor' of hot Jupiters, a highly eccentric planet with an orbit providing clues to its evolution. The planet, TIC 241249530 b, is expected to become a scorching hot Jupiter in about 1 billion years.
A team of astronomers has discovered an exoplanet with an elongated and backwards orbit, which holds clues to the formation history and future trajectories of high-mass gas giants. The exoplanet, named TIC 241249530 b, is approximately five times more massive than Jupiter and orbits its host star in a highly eccentric path.
Researchers discovered a highly eccentric exoplanet named TIC 241249530 with an orbital eccentricity of 0.94, causing extreme temperature variations. The planet's unusual backward-orbiting motion provides insight into the formation history and future trajectories of hot Jupiters.