Articles tagged with Exoplanets
Researchers at UCR's Alternative Earths Astrobiology Center are developing a framework for dynamic biosignatures based on seasonal changes. They found that ozone could be a more easily measurable marker for seasonal variability in oxygen, which is produced by life. Observing atmospheric seasonality in exoplanets may help detect life.
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.
Astronomers have successfully detected helium in the atmosphere of WASP-107b, a super-Neptune exoplanet. The detection was made using the Hubble Space Telescope and reveals an abundance of helium in the upper atmosphere, extending tens of thousands of kilometres into space.
Researchers simulated conditions inside a planet three times larger than Earth using high-powered laser beams. The study revealed that the crystal structure of iron-silicon alloys changes with higher silicon content under extreme pressures, providing new insights into the nature of super-Earths and their cores.
The discovery of 51 Pegasi b marked a significant milestone in the search for exoplanets, with Michel Mayor and his colleague Queloz credited with the groundbreaking find. The development of better telescopes enabled this achievement, contributing to a new community of researchers exploring this field.
The Transiting Exoplanet Survey Satellite (TESS) will survey nearly the entire sky for signs of passing planets. The spacecraft aims to detect thousands of stars hosting transiting planets and measure the masses of at least 50 small planets less than four times that of Earth.
Researchers have developed chemical models from car engines to study the atmospheres of hot exoplanets. The results show deviations in these atmospheres due to extreme temperatures and pressures.
A team of MIT researchers has developed a machine-learning system that can automatically search for debris disks around stars, indicating the presence of exoplanets. The system achieved a 97% accuracy rate and identified 367 previously unexamined celestial objects as promising candidates for further study.
Scientists at Johns Hopkins University conducted the first laboratory simulations of exoplanet atmospheres to understand haze formation and its impact on habitability. The study found that certain gas combinations produce more haze particles, which can affect atmospheric temperature structures and potentially shield life.
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.
Scientists from NASA and universities are investigating exoplanets to determine their habitability, focusing on astrophysics, Earth science, heliophysics, and planetary science. Researchers use tools like DSCOVR's high-resolution images to simulate habitable planets and study the interaction between stars and planets.
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.
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 found that equatorial regions on planets like Proxima b and TRAPPIST-1d might trap ozone, hiding signs of life from telescopic observations. This discovery highlights the challenges in detecting life beyond Earth, requiring a more nuanced strategy for searching for life.
Researchers suggest hunting for cruder signatures of potentially habitable worlds, which would be easier to detect with current resources in less time. They look for atmospheres rich with water vapor and nitrogen, and oxygen, as these are basic molecules that are biologically friendly and have strong infrared emitting power.
A citizen scientist has discovered a comet's tail streaking past a distant star using data from the Kepler Space Telescope. The discovery marks the first time an object as small as a comet has been inferred by observing dips in a star's light.
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.
Researchers used a new model to simulate atmospheric conditions in three dimensions, revealing a key role for stellar radiation in creating moist greenhouse states on exoplanets. This process could make planets closer to their stars habitable despite intense radiation and tidal forces.
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.
KFU astronomers have made a groundbreaking discovery of an exoplanet orbiting a red giant star HD208897, located 210 light years away from Earth. The planet has a mass of 1.4 Jupiter masses and an orbital period of 353 days, marking the first time in Russian astronomy such a discovery was made using spectroscopic methods.
A team of scientists identified 68 exoplanets where observers can see the planets in our Solar System transit the Sun. Nine of these are ideally placed to observe Earth's transits, although none are habitable.
Researchers at the University of Texas at Arlington predicted an additional Earth-like planet in the Gliese 832 system, with stable orbital configuration and mass range of 1-15 Earth masses. The team analyzed simulated data using injected Earth-mass planet to find a habitable zone for potential new world.
Astronomer Rory Barnes finds that tidal locking is a major factor in the evolution of potentially habitable exoplanets, suggesting they may be more common than previously thought. The research suggests that even Earth's 'twin' could be tidally locked.
TESS will survey stars up to 100 times brighter than Kepler, finding thousands of new exoplanets around bright nearby stars. The mission will provide ideal targets for follow-up observations with the James Webb Space Telescope.
Researchers have found compelling evidence for a stratosphere on the enormous planet WASP-121b, hot enough to boil iron. The discovery was made using NASA's Hubble Space Telescope and indicates a strong stratosphere on this gas giant exoplanet.
Scientists have found a stratosphere on an enormous gas giant exoplanet WASP-121b with an atmosphere hot enough to boil iron. The discovery was made using spectroscopy to analyze the planet's brightness at different wavelengths of light, revealing glowing water molecules.
The Planetary Spectrum Generator (PSG) is being enhanced with additional databases to provide more accurate predictions of instrument performance. This will enable scientists to design and plan future missions more efficiently, reducing costs and resources.
A computer model suggests that Proxima b's atmosphere could be lost 10,000 times faster than Earth's due to extreme ultraviolet radiation from its host star. The study considers factors like thermosphere temperature and magnetic field orientation to understand the impact of stellar physics on habitability.
Astronomers have discovered an exoplanet, HIP65426b, using the SPHERE/VLT instrument for the first time. The planet is located at three times the Earth-Neptune distance from its star and has a mass 6 to 12 times higher than Jupiter.
Research suggests that exoplanets near cool, low-mass stars require strong magnetic fields to shield their atmospheres from harmful X-rays and extreme pressure. The study models CMEs in a cool star system and finds that most CMEs are trapped by the star's surface, posing a significant threat to planetary habitability.
A team of astronomers advocates for a statistical comparative approach to find habitable planets and life beyond the solar system. By studying large numbers of exoplanets with less detailed measurements, they can estimate the frequency of habitable environments and life on those planets.
Scientists have discovered an exoplanet, KELT-9b, hotter than most stars, with a day-side temperature of 4,600 Kelvin. The planet's atmosphere is being evaporated due to intense ultraviolet radiation from its host star.
Two exoplanets, WASP-67 b and HAT-P-38 b, have distinct atmospheric compositions, with one being cloudier than the other. The team's findings suggest that their past formation histories may be responsible for these differences.
Researchers used the Met Office Unified Model to simulate Proxima B's climate, finding it could have a habitable atmosphere and stable climate regime. The team also explored different atmospheric compositions and orbital configurations, suggesting the planet could support life.
Astronomers have found clear signs of water in the atmosphere of HAT-P-26b, a Neptune-sized exoplanet. The presence of water suggests that the planet's gaseous envelope formed late in its formation process, with little to no pollution by impacting debris.
A team of researchers discovered that SIMP J013656.5+093347 is a planetary mass object, rather than a brown dwarf, due to its mass being at the boundary between brown dwarf-like and planet-like properties. This finding offers new insights into the atmospheres of gas giant exoplanets.
Astronomers predict that combining NIRISS and NIRSpec on James Webb Space Telescope will maximize information content about exoplanet atmospheres. This combination allows for the observation of key chemical compounds such as water, methane, and carbon dioxide.
A rocky super-earth, LHS 1140b, has been discovered orbiting an M-type star in the habitable zone, making it a promising candidate for atmospheric study and search for life. The planet's size and mass indicate a rocky composition, and its distance from the star allows for relatively cool temperatures.
Astronomers have discovered a super-Earth orbiting a quiet red dwarf star, LHS 1140, in the habitable zone where liquid water can exist. The exoplanet's large size and dense iron core suggest it may have retained an atmosphere long after its star calmed down.
The DFG is funding six new research units and two humanities centers focusing on topics such as plant morphodynamics, Russian lyric poetry, and trace element interactions. These initiatives aim to advance knowledge in various fields and tackle pressing issues.
A team of scientists led by Jonathan Gagné has found evidence of undetected giant exoplanets in the TW Hya star association, approximately 100 light years from Earth. The researchers used an initial mass function to calculate the distribution of mass in the group and predict the number of undiscovered objects.
The international team released a large dataset of exoplanet-detecting observations using the radial velocity method, identifying over 100 potential planets, including one orbiting the fourth-closest star to our Solar System. The data will enable astronomers around the globe to search for new planets and follow up on existing signals.
A team of scientists has released the largest collection of observations made with radial velocity to be used for hunting exoplanets. The dataset includes almost 61,000 measurements of more than 1,600 nearby stars and has detected over 100 potential exoplanets, including one orbiting GJ 411.
Researchers at Yale University developed a novel approach to detect exoplanets by analyzing signal fluctuations in star spectral intensity. By studying all signal information together, they can refine the search for Earth-like planets and improve traditional methods.
A team of researchers from the University of Toronto has developed a novel machine learning approach to determine whether planetary systems are stable or not. This method is 1,000 times faster than traditional methods and can provide valuable information about exoplanets, including their mass and orbital eccentricity.
Scientists successfully measured the orbital period of K2-3d with high precision, enabling precise predictions of future transits. This improved forecast accuracy paves the way for searching for extraterrestrial life in the atmosphere of the planet.
A team of OU researchers collaborated with citizen scientists to discover a rare circumstellar disk, the oldest of its kind, around a red dwarf star. The discovery provides insights into why M dwarf disks appear so rare and may hold clues about the possibility of extrasolar planets.
A team of citizen scientists and professional astronomers have discovered an unusual exoplanet hunting ground, finding the oldest known circumstellar disk orbiting a young star. The discovery, led by Steven Silverberg, reveals a red dwarf star with a warm disk that has sustained its disk for an exceptionally long time.
Researchers at Ibaraki University used ALMA to observe the disk around TW Hydrae, finding multiple gaps that match theoretical predictions for planet formation. The team estimates a massive, icy giant planet similar in size to Neptune, with a mass likely more than that of Neptune.
Gros has investigated the possibility of bringing life to planets with temporary habitability, proposing an automated gene laboratory on board a probe. The Genesis mission could be achieved within decades with interstellar unmanned micro spacecraft, potentially allowing for the development of complex life forms.
Astronomers confirm 104 exoplanets outside our solar system using NASA's Kepler spacecraft on its K2 mission. The discoveries include a planetary system with four promising rocky planets orbiting the M dwarf star K2-72.
Researchers from KU Leuven show that surface composition and atmosphere interaction on exoplanets affect their temperature and habitability. A well-functioning 'air conditioning' system can make even planets with permanent day and night sides potentially habitable.
Recent exoplanet discoveries by NSF-supported graduate researchers expand our understanding of how planets form and orbit stars. These breakthroughs include the detection of a unique planet in a triple-star system, one of the youngest fully formed exoplanets ever discovered.
Astronomers have discovered a planet in a unique position between three stars, experiencing constant daylight or triple sunrises and sunsets. The planet, HD 131399Ab, is one of the youngest exoplanets discovered to date and has a wide orbit within a multi-star system.
Researchers use SPHERE instrument to image first planet in wide orbit inside a triple-star system, suggesting such systems may be more common than thought. The planet, HD 131399Ab, has an unstable orbit and is estimated to be around 16 million years old, making it one of the youngest exoplanets discovered.
Researchers directly detected a gas giant planet with a wide orbit in the young triple star system HD 131399, challenging existing knowledge about exoplanet detection. The unusual arrangement of the three stars and the planet's size, containing water and methane, may have formed through interactions between planets or binary stars.
Researchers suggest that hot, rocky planets could alter their bulk composition, density, and internal structure due to steam atmosphere loss. This process may have implications for understanding the early Earth's evolution and character.
Astronomers have discovered a newborn exoplanet, K2-33b, which is five-10 million years old and orbits its star once every five days. The discovery provides an extraordinary snapshot of the planet formation process, allowing researchers to study how planets form and develop.
A team of Caltech-led researchers has discovered the youngest fully-formed exoplanet ever detected, K2-33b, which orbits a young star at 5 to 10 million years old. The planet's proximity to its star and large size suggest it may have formed quickly or challenged the migration theory.
Astronomers at Lund University propose that Planet 9, a mysterious object in our solar system, may be an exoplanet captured by the sun. The study suggests that the sun stole the planet from its original star during a close encounter.