Giant planets in the habitable zone may host exomoons with conditions conducive to life. In this paper we describe a method by which the Habitable Worlds Observatory (HWO) could detect […]
Gas Giants
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gas Giants, Ice Giant, Icy Worlds, Press Release
Key To Researching Large Planets: Research Team Discovers Novel Form Of Water
Temperatures of several thousand degrees Celsius and pressures of millions of atmospheres: superionic water only forms under extreme conditions. These conditions transform water into an unusual state in which hydrogen […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
Giant Outer Transiting Exoplanet Mass (GOTEM) Survey.VII. TOI-6041: A Multi-planet System Including A Warm Neptune Exhibiting Strong TTVs
We present the characterization of the TOI-6041 system, a bright (V=9.84±0.03) G7-type star hosting at least two planets.
![[LEFT:] A Rare Brown Dwarf: HIP 71618 B [RIGHT:] A New Giant Planet: HIP 54515 b -- W. M. Keck Observatory and the Subaru Telescope.](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/12/Discoveries-From-Maunakea-Reveal-1.png?resize=1200%2C720&ssl=1)
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Press Release, Stellar Cartography
Discoveries From Maunakea Reveal Hidden Worlds Around Accelerating Stars
Astronomers using W. M. Keck Observatory and the Subaru Telescope on Maunakea, Hawaiʻi Island have discovered a massive planet and a brown dwarf orbiting distant stars—two rare companions that deepen […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release, Science Fiction
Rare Image Of Tatooine-like Planet Is Closest To Its Twin Stars Yet
In a discovery that’s fit for a movie, Northwestern University astronomers have directly imaged a Tatooine-like exoplanet, orbiting two suns.
Posted inAstrogeology, Exoplanets, -moons, -comets, Gas Giants, Status Report
Formation Of Cold Giant Planets Around Late M Dwarfs Via Core Accretion And The Fate Of Inner Rocky Worlds
Modeling the formation of cold giant planets around M dwarfs is difficult because their disks may not contain enough solids to form massive cores and because forming giants are expected […]
Posted inAI - Data - Apps - Cybernetics, Astronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
First Results From The Subaru Telescope’s OASIS Survey: Direct Imaging Of New Worlds Around Unexplored Stars
The discovery of two remarkable substellar companions orbiting distant stars has been announced by an international team of astronomers using the Subaru Telescope’s sharp adaptive-optics imaging together with precision stellar […]
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gas Giants, Status Report
Methane On The Temperate Exo-Saturn TOI-199b
Temperate (Teq<400 K) gas giants represent an unexplored frontier in exoplanet atmospheric spectroscopy. Orbiting a G-type star every ~100 days, the Saturn-mass exoplanet TOI-199 b (Teq=350 K) is one of […]
Posted inAtmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Press Release
Efficiency of Hydrodynamic Atmospheric Escape in Hot Jupiters and Super Earths
We develop a flexible one-dimensional code to model the escape of hydrogen and helium from a hot Jupiter as a result of photoionization from extreme-ultraviolet (EUV) radiation.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Ice Giant, Imaging & Spectroscopy, Status Report
A JWST Transit Of A Jupiter Analog: II. A Search For Exomoons
We present a search for exomoons around the Jupiter-like exoplanet Kepler-167e using a NIRSpec JWST transit.