A new study led by Dr. Assaf Hochman uncovers ozone's impact on atmospheric stability and temperature distribution on Proxima Centauri b, a habitable exoplanet tantalizingly close to Earth's solar system. The research highlights the importance of considering interactive ozone in understanding Earth-like exoplanets.
SourceThe Hebrew University of Jerusalem·JournalMonthly Notices of the Royal Astronomical Society·TypeComputational simulation/modeling·DateMay 8, 2024
A new study challenges the initial detection of a biosignature gas on K2-18b, suggesting that the data may be inconclusive. However, researchers believe it's possible for life to produce detectable levels of dimethyl sulfide (DMS) in the planet's atmosphere.
SourceUniversity of California - Riverside·JournalThe Astrophysical Journal Letters·DateMay 2, 2024
Researchers at NYU Abu Dhabi have discovered thick clouds and a surprising lack of methane on the planet's nightside, while ubiquitous water presence was found throughout its atmosphere. The discovery reveals the first observation of clouds on the nightside of WASP-43b, a giant gas-filled exoplanet.
SourceNew York University·JournalNature Astronomy·DateApr 30, 2024
A team of astronomers and citizen scientists has discovered a planet in the habitable zone of an unusual star system, including two stars and potentially another exoplanet. The newly discovered planet, TOI 4633 c, boasts the second-longest orbit of any planet discovered with TESS data.
SourceSimons Foundation·JournalThe Astrophysical Journal·DateApr 30, 2024
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A new study led by Durham University researchers proposes that strong stellar magnetic fields can dissipate gravitational tides, leading to the orbital decay of 'hot Jupiter' exoplanets. The findings suggest certain nearby stars may be good targets for searching additional hot Jupiter planets on decaying orbits.
SourceDurham University·JournalThe Astrophysical Journal Letters·DateApr 28, 2024
Researchers introduce a new model that suggests dense stellar clusters can eject pairs of giant planets, which remain gravitationally bound to each other as they float through space. This discovery fills a critical gap in our understanding of planetary evolution and challenges prevailing theories of planet formation.
SourceUniversity of Nevada, Las Vegas·JournalNature·DateApr 19, 2024
Researchers have successfully determined the size and atmospheric composition of exoplanet WASP-39b by including a star's magnetic field in model calculations. The study improves upon previous observations by providing a more precise understanding of the planet's signal in light curves.
SourceMax Planck Institute for Solar System Research·JournalNature Astronomy·TypeComputational simulation/modeling·DateApr 12, 2024
Astronomers have detected a 'glory', a luminous phenomenon like a rainbow, in the atmosphere of WASP-76b, an ultra-hot giant exoplanet. The phenomenon occurs when light is reflected by clouds made up of perfectly uniform droplets, which could be iron or water.
SourceUniversité de Genève·JournalAstronomy and Astrophysics·TypeNews article·DateApr 5, 2024
A group of high school students from the Galaxy Explorer program made contributions to exoplanet research using backpack-sized digital smart telescopes. They observed and confirmed a warm and dense sub-Saturn planet, TIC 139270665 b, orbiting a metal-rich star.
SourceSETI Institute·JournalThe Astronomical Journal·DateMar 20, 2024
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A team of astronomers has shed new light on the process of planet formation through a groundbreaking survey of over 80 young stars. The research provides a wealth of data and unique insights into how planets arise in different regions of our galaxy, revealing diverse patterns of planet-forming discs.
SourceESO·JournalAstronomy and Astrophysics·DateMar 5, 2024
Researchers applied Bayesian network analysis to a corpus of 142 science fiction works, investigating the representation of extrasolar planets. They found that after the discovery of real exoplanets in 1995, fictional exoplanets became less Earth-like, reflecting the scientific reality of vast numbers of diverse exoplanet types.
SourceSissa Medialab·JournalJournal of Science Communication·TypeData/statistical analysis·DateMar 4, 2024
Researchers have discovered water vapor in the disc around a young star exactly where planets are forming. The Atacama Large Millimeter/submillimeter Array (ALMA) enabled detailed images and spatially resolved observations, revealing three times as much water as Earth's oceans in the inner disc of the HL Tauri star.
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The study, published in The Astrophysical Journal, tested the future LIFE mission's capabilities on real spectra using data from NASA's Aqua Earth observation satellite. It demonstrated that a space telescope like LIFE could detect signs of a temperate, habitable world on Earth-like exoplanets.
SourceETH Zurich·JournalThe Astrophysical Journal·DateFeb 27, 2024
Astronomers have discovered an extreme Earth-like planet with lava oceans that orbits its sun-like star every four days. The young planet, just 500 million years old, is the nearest Earth-sized planet found so far and could provide valuable insights into the evolution of planets similar to our own.
SourceUniversity of Florida·JournalThe Astronomical Journal·TypeData/statistical analysis·DateFeb 23, 2024
Research suggests that planetary migration is the key to explaining the mysterious gap in the size distribution of super-Earths. Simulations show that sub-Neptunes' evolution contributes to the observed radius valley, while rocky planets 'shrink' by losing their atmosphere.
SourceMax Planck Institute for Astronomy·JournalNature Astronomy·TypeComputational simulation/modeling·DateFeb 9, 2024
Researchers have identified a CO-rich atmosphere on exoplanets that could support life. The study reveals a 'gap' in atmospheric conditions where CO levels are higher than expected, indicating potential habitability.
SourceTokyo Institute of Technology·JournalThe Astrophysical Journal·TypeExperimental study·DateFeb 6, 2024
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Researchers have discovered a multi-planet system that provides a rare glimpse into the formation of planets around a young star. The system consists of six confirmed planets and potentially a seventh, all forming under similar conditions at an age of just 700 million years.
SourceUniversity of California - Riverside·JournalThe Astronomical Journal·DateJan 29, 2024
Researchers from Ohio State University tested upcoming telescopes' ability to detect chemical traces of oxygen, carbon dioxide, methane and water on 10 rocky exoplanets. The study found that two nearby worlds, Proxima Centauri b and GJ 887 b, are highly adept at detecting biosignatures with advanced telescopes.
SourceOhio State University·JournalThe Astronomical Journal·DateJan 29, 2024
Astronomers have discovered a small, cold exoplanet with an orbital period of 146 days, providing insight into planetary formation and evolution. The planet, HD88986b, is about twice the size of Earth and orbits a star similar to the Sun.
SourceUniversity of Warwick·JournalAstronomy and Astrophysics·DateJan 11, 2024
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Researchers have discovered a Jupiter-sized planet, WASP-69b, with a comet-like tail that trails the planet for at least 350,000 miles. The tail is shaped and pushed in the direction of Earth by radiation and an outflow of gas from its host star, providing a rare opportunity to study planetary mass-loss in real time.
SourceUniversity of California - Los Angeles·JournalThe Astrophysical Journal·DateJan 9, 2024
Researchers used the James Webb Space Telescope to analyze the atmospheric composition of HAT-P-18 b, detecting water vapour and carbon dioxide. They also found a cloud deck that mutes the signals of many molecules, and their findings suggest the star's surface is covered by dark spots. The study highlights the importance of considerin...
SourceUniversity of Montreal·JournalMonthly Notices of the Royal Astronomical Society·DateJan 9, 2024
Researchers detected complex structure with three concentric rings in the innermost region of the disk, rich in dust and minerals. The discovery suggests two planets may be forming within the gaps, with masses similar to Jupiter.
SourceMax Planck Institute for Astronomy·JournalAstronomy and Astrophysics·TypeObservational study·DateJan 8, 2024
Scientists propose searching for depleted carbon dioxide in planetary atmospheres as a sign of liquid water and potentially life on other planets. A study suggests that low carbon abundance relative to neighboring planets could indicate habitability.
SourceMassachusetts Institute of Technology·JournalNature Astronomy·DateDec 28, 2023
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Researchers have devised a new method to identify habitable planets and potentially inhabited planets by comparing atmospheric CO2 levels, which suggests the presence of liquid water. This signature can be detected with current telescopes, providing a path to identify life on exoplanets.
SourceUniversity of Birmingham·JournalNature Astronomy·DateDec 28, 2023
Scientists simulated the runaway greenhouse effect, transforming habitable climates into hostile environments, with significant changes in atmospheric structure and cloud coverage. The study provides key insights for the search of life elsewhere, as it demonstrates a critical water vapor threshold beyond which a planet cannot cool down.
SourceUniversité de Genève·JournalAstronomy and Astrophysics·TypeNews article·DateDec 18, 2023
Researchers have observed the atmospheres of seven hot Jupiters using NASA's CUTE spacecraft, revealing that some planets lose significant gas while others remain unchanged. The findings suggest a combination of planetary size and stellar activity plays a role in atmospheric escape. CUTE's precise measurements provide valuable insights...
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New research from the Max Planck Institute challenges previous claims of giant exomoons around Kepler-1625b and Kepler-1708b. The study uses a computer algorithm to analyze observations, finding that 'planet-only' interpretations are more conclusive than initially thought.
SourceMax-Planck-Gesellschaft·JournalNature Astronomy·TypeData/statistical analysis·DateDec 7, 2023
Astronomers have discovered a rare six-planet system, HD110067, that exhibits an orbital resonance pattern, repeating every three and four orbits. This unique configuration provides valuable information on how sub-Neptunes form, evolve, and potentially support liquid water on their surfaces.
Researchers created lab-made haze to understand how it affects observations of distant planets, which could lead to misinterpretations of global temperatures and biological activity. The new data offers a better understanding of exoplanet atmospheres, helping scientists focus on specific planets and improve their search for life.
SourceJohns Hopkins University·JournalNature Astronomy·TypeExperimental study·DateNov 27, 2023
The James Webb Space Telescope observed the exoplanet WASP-80 b and detected methane gas and water vapor in its atmosphere. This is the first detection of methane in an exoplanet's atmosphere using space-based spectroscopy.
SourceNASA/Goddard Space Flight Center·JournalNature·DateNov 22, 2023
The NASA Hubble Space Telescope has measured the size of LTT 1445Ac, an Earth-sized exoplanet passing in front of a neighboring star. The planet's diameter is found to be 1.07 times that of Earth, indicating a rocky world with surface gravity similar to our own.
SourceNASA/Goddard Space Flight Center·JournalThe Astronomical Journal·TypeObservational study·DateNov 16, 2023
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The James Webb Space Telescope reveals the presence of water vapour, sulfur dioxide, and silicate sand clouds in the atmosphere of WASP-107b. The discovery sheds light on the dynamic atmosphere and potential temperature variations that enable these cloud formations.
SourceKU Leuven·JournalNature·TypeObservational study·DateNov 15, 2023
The James Webb Space Telescope has detected distinct neon signatures in the dusty disk surrounding the young Sun-like star SZ Chamaelontis, indicating a change in high-energy radiation that reaches the disk and limits planet formation time. This difference points to a variable wind absorbing UV light and leaving X-rays to pummel the disk.
SourceNASA/Goddard Space Flight Center·JournalThe Astrophysical Journal Letters·DateNov 15, 2023
Researchers from the University of Cambridge found that comets can deliver intact prebiotic molecules to planets in 'peas in a pod' systems, which are promising places to search for life outside our Solar System.
SourceUniversity of Cambridge·JournalProceedings of the Royal Society A Mathematical Physical and Engineering Sciences·DateNov 14, 2023
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A recent study by Professor Amri Wandel reveals that subglacial liquid water can extend the Habitable Zone for tidally locked planets and even broaden its limits. This discovery presents opportunities for searching for extraterrestrial life on a diverse range of exoplanets.
SourceThe Hebrew University of Jerusalem·JournalThe Astronomical Journal·TypeComputational simulation/modeling·DateNov 9, 2023
A team of researchers has detected ammonia isotopologues in the atmosphere of a cold brown dwarf, providing new clues to understanding gas giant formation. The ratio of two isotopologues reveals that the exoplanet formed through gravitational collapse, challenging traditional theories.
Researchers analyzed Earth's evolution over the past 540 million years, finding that telescopes could better detect signs of life on exoplanets with a similar atmospheric composition to ancient Earth. The study suggests that planets resembling Phanerozoic Earth would have a stronger light fingerprint, making them more promising targets...
SourceCornell University·JournalMonthly Notices of the Royal Astronomical Society Letters·DateNov 2, 2023
New studies show that giant gas planets in nearby star systems can prevent life on smaller, rocky planet neighbors by kicking them out of orbit and wreaking havoc on their climates. Researchers found that four giant planets in the HD 141399 system are likely to destroy the chances for life on Earth-like planets.
SourceUniversity of California - Riverside·JournalThe Astronomical Journal·DateOct 31, 2023
Researchers used the NASA Exoplanet Archive and planetary system simulations to find that a drift rate of 53 nHz is sufficient in 99% of known-exoplanet cases. This threshold drops to 0.44 nHz for stars without known planets, reducing computing time and boosting efficiency for future SETI campaigns.
SourceSETI Institute·JournalThe Astronomical Journal·DateOct 23, 2023
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A new study reveals that magma oceans on rocky exoplanets can affect their size, evolutionary path, and mantle structure. The research found that these ocean's compressible nature can make lava-rich planets denser than solid planets of similar size.
SourceOhio State University·JournalThe Astrophysical Journal·TypeObservational study·DateSep 26, 2023
The James Webb Space Telescope has discovered methane and carbon dioxide in the atmosphere of K2-18 b, an exoplanet with a hydrogen-rich atmosphere and potential for a water ocean surface. The findings support the hypothesis that K2-18 b could be a Hycean exoplanet, making it a promising environment to search for life.
SourceNASA/Goddard Space Flight Center·JournalThe Astrophysical Journal Letters·DateSep 11, 2023
Researchers from University of New Mexico and Massachusetts Institute of Technology have detected two long-period giant planets orbiting an early K dwarf star. The exoplanets, TOI-4600 b and c, have orbital periods of 82.69 days and 482.82 days, respectively, making them the longest-period planets found by TESS to date.
SourceUniversity of New Mexico·JournalThe Astrophysical Journal Letters·TypeObservational study·DateAug 31, 2023
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Researchers have confirmed the presence of chromium hydride in the atmosphere of hot Jupiter exoplanet WASP-31b using high-resolution spectral observations. This detection opens the possibility of using chromium hydride as a 'thermometer' to determine the temperature and other characteristics of exoplanets.
SourceCornell University·JournalThe Astrophysical Journal Letters·DateAug 28, 2023
Researchers have discovered an unusual Jupiter-sized exoplanet, TOI-4860 b, orbiting a low-mass star in the Corvus constellation. The planet is enriched with heavy elements and takes about 1.52 days to complete its orbit, making it a 'Warm Jupiter'.
SourceUniversity of Birmingham·JournalMonthly Notices of the Royal Astronomical Society·DateAug 3, 2023
The Hubble Space Telescope has observed extreme variability in the atmosphere of an exoplanet orbiting a young red dwarf star. The planet, AU Mic b, experiences unpredictable blasts of energy that evaporate its hydrogen atmosphere, but with varying success.
SourceNASA/Goddard Space Flight Center·JournalThe Astronomical Journal·TypeObservational study·DateJul 27, 2023
Researchers used a new code to test the capabilities of future giant telescopes, which could help identify potentially habitable planets. The study found that ELT and TMT can make high-resolution observations of brown dwarfs and exoplanets over a single rotation, while GMT's instruments require multiple rounds.
SourceOhio State University·JournalThe Astrophysical Journal·TypeData/statistical analysis·DateJul 27, 2023
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A new study has captured the early stages of planetary evolution, observing a young gas planet's violent and erratic atmospheric shedding. The research, led by Dartmouth researchers, provides insights into the most common experiences of planets beyond our solar system.
SourceDartmouth College·JournalThe Astronomical Journal·TypeObservational study·DateJul 27, 2023
The James Webb Space Telescope has detected water vapor in the inner disk of PDS 70, a star with both an inner and outer disk of gas and dust. This discovery suggests that rocky planets may form with water available to them from the beginning.
SourceNASA/Goddard Space Flight Center·JournalNature·DateJul 24, 2023
Researchers from Ohio State University found that some low-mass stars have unexpectedly strong surface magnetic fields, which could intensify their radiation for billions of years. This discovery challenges current models of stellar evolution and has important implications for the search for life on other planets.
SourceOhio State University·JournalThe Astrophysical Journal Letters·TypeObservational study·DateJul 17, 2023
The study found that adding CO2 to temperate terrestrial exoplanet atmospheres intensifies warming in non-irradiated regions, altering global circulation patterns. This effect is seen on both Earth and the exoplanet TRAPPIST-1e, with implications for habitability and climate research.
SourceThe Hebrew University of Jerusalem·JournalNature·TypeComputational simulation/modeling·DateJul 12, 2023
Scientists have discovered a young exoplanet, MWC 758c, that may be generating the spiral arms in its infant planetary system. The planet's massive size is estimated to be at least twice the mass of Jupiter, yet it was invisible to other telescopes due to its reddish color, which makes it more difficult to detect.
SourceUniversity of Arizona·JournalNature Astronomy·TypeObservational study·DateJul 6, 2023
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Scientists using ALMA have discovered the most compelling chemical evidence to date of protoplanet formation. The discovery provides an alternate method for detecting and characterizing protoplanets, particularly those embedded in their parental circumstellar disks.
SourceNational Radio Astronomy Observatory·JournalThe Astrophysical Journal Letters·DateJun 27, 2023
A newly discovered exoplanet, LP 890-9c, is providing important insights into conditions at the inner edge of a star's habitable zone. The team's models detail differences in chemical signatures generated by rocky planets near this boundary, based on variables including size, mass, and surface temperature.
SourceCornell University·JournalMonthly Notices of the Royal Astronomical Society·DateJun 21, 2023
Scientists have discovered that stagnant lid tectonics, not plate tectonics, existed on early Earth, releasing heat and forming continents. This finding contradicts previous assumptions about the role of mobile plate tectonics in life's emergence, suggesting an alternative mechanism was present.
SourceUniversity of Rochester·JournalNature·DateJun 14, 2023
Researchers discovered the abundance of rock-forming elements in WASP-76 b's atmosphere, which matches its host star and our own Sun closely. The team found that certain elements are depleted due to temperature conditions, providing insight into the sensitivity of giant planet atmospheres.
Astronomers using the Gemini North telescope have detected 11 rock-forming elements in the atmosphere of WASP-76b, a Jupiter-like exoplanet. The presence and relative amounts of these elements provide key insights into giant gas planet formation and may challenge our understanding of how planets like Mercury and Earth formed.
SourceAssociation of Universities for Research in Astronomy (AURA)·JournalNature·DateJun 14, 2023
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Researchers found rock-forming elements in the atmosphere of WASP-76 b, which suggests it might have accreted a smaller Mercury-like planet. The discovery provides unprecedented insight into the presence and abundance of rock-forming elements in giant planets.
Researchers have discovered a large gas giant orbiting two stars using the radial velocities method for the first time. The newly found system, TOI-1338/BEBOP-1, is only the second binary star system known to host multiple planets ever confirmed.
SourceOhio State University·JournalNature Astronomy·TypeObservational study·DateJun 12, 2023
Researchers have identified a second circumbinary planet, BEBOP-1c, in the TOI-1338/BEBOP-1 system using state-of-the-art instruments. The newly discovered planet has a mass 65 times larger than Earth and orbits both stars at once.
SourceUniversity of Birmingham·JournalNature Astronomy·TypeObservational study·DateJun 12, 2023
The CHEOPS satellite has successfully detected two elusive exoplanets, TOI 5678 b and HIP 9618 c, using its precise measurements. The planets have sizes similar to Neptune and Earth radii, respectively, with orbital periods of 48 days and 52.5 days.
SourceUniversity of Bern·JournalMonthly Notices of the Royal Astronomical Society·TypeObservational study·DateJun 8, 2023