![Atmospheric and water loss of an Earth-like planet for three stellar systems: (e,f) M-dwarf (TRAPPIST-1) central habitable zone. The mass losses shown in a,b,c and d are after 6 Gyr of system integration. -- Full chart below [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Simulated-Effects.png?resize=1200%2C718&ssl=1)
[astro-ph.EP] Thousands of exoplanets have been discovered in recent decades, yet Earth remains the only known world with life.
Exoplanets, -moons, -comets
![Stellar age versus planet radius for all planets in the Mission Candidate Sample. Planets younger than 200 Myr are highlighted in blue. The four planets marked with a star represent promising young targets. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Probing.png?resize=1200%2C717&ssl=1)
Posted inAriel Mission
Probing Exoplanetary Chemistry with Ariel: Scientific Priorities and Observational Strategies
[astro-ph.EP] Over the past two decades, increasingly precise observations have revealed that exoplanet atmospheres are chemically diverse and often far from equilibrium, with processes such as vertical mixing, photochemistry, and […]
![Contribution of a flare to the observed spectrum on anM-dwarf using a BT-Settl model spectrum (Allard 2014) -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Stellar-flares.png?resize=1200%2C714&ssl=1)
Posted inAriel Mission
Stellar Flares With Ariel: Detection Prospects And Impacts On Exoplanet Spectroscopy
[astro-ph.SR] Stellar flares are important tracers of magnetic activity and can significantly influence the characterization of exoplanet host stars by introducing time-dependent astrophysical variability.
Posted inLava / magma ocean / Volcanic Worlds
Thermal Evolution of Lava Planets Across System Ages: Predictions for Hell of a Survey
[astro-ph.EP] Ultra-short-period (USP) rocky exoplanets can have dayside temperatures high enough to maintain permanent magma oceans, sitting at the intersection of interior geophysics and atmospheric chemistry. Coupled feedbacks between the […]
Posted inBrown Dwarfs
Water Cloud and Chemical Modulations in the Coldest Brown Dwarf
[astro-ph.EP] We present high signal-to-noise, medium resolution (R ~ 1000), time-series JWST/NIRSpec spectra of WISE 0855 (265K), the coldest known brown dwarf.
![JWST MIRI images of the HD 101452 system before and after PSF subtraction. The top row shows 100×100 pixel cutouts of the MIRI images centered on HD 101452 prior to PSF subtraction. The bottom row shows the corresponding PSF-subtracted images. All panels use a common surface brightness scale (-5 to 50 MJy/sr). The companion is detected in all filters at a consistent location with a measured separation of r = 1.276±0.004′′ and position angle θ = 84.3±0.2 ◦ East of North at the time of observation. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/A-Binary-Flux.png?resize=1200%2C719&ssl=1)
Posted inExoplanets, -moons, -comets
A Binary Flux Calibrator Reveals the Scientific Potential of Short-integration JWST MIRI Imaging to Directly Detect sub-Jupiter Exoplanets
[astro-ph.EP] We report the direct imaging detection of a stellar companion to HD 101452 (HIP 56925; Gaia DR3 5384905720847544192), an A star historically used as an infrared flux calibrator.
![Radial gas temperature maps for planets within the in-house 3D GCM framework. The panels illustrate equatorial slice plots of (Tgas, pgas) across three global temperature regimes: 800 K (left), 1600 K (center), and 2400 K (right). Host star types vary by row, descending from A-type to G-type and M-type stars [1] -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Faithful.png?resize=1200%2C717&ssl=1)
Posted inExoplanets, -moons, -comets
Faithful Neural Embeddings For 3D Exoplanet Climate Modeling
[astro-ph.EP] With the rapid advancement of telescopes like JWST and Ariel, there is an urgent need for efficient 3D climate models to interpret observations of exoplanet atmospheres.
Posted inExoplanets, -moons, -comets
The First Complete Picture Of (Gas) Planet Formation In Action
[Max Planck Institute for Astronomy] Over the past decades, astronomers have reconstructed a fairly complete scenario for planet formation, from minute dust motes clumping together to the emergence of rocky […]
Posted inBeta Pictoris
Discovery Of Radio Emission From The Exoplanet β Pictoris b
[astro-ph.EP] Planetary magnetic fields shape atmospheric escape, mediate interactions with stellar winds, and encode information about planetary interiors, yet they have not been directly measured for planets beyond the Solar […]
Posted inHabitable Zones
Inside the Eirenesphere: The Interplay of Porosity, Heat Flux and Mineralogy in Exoplanetary Aquable and Habitable Layers
[astro-ph.EP] The classical circumstellar habitable zone restricts the search for life to planetary surfaces where stellar irradiation sustains liquid water, overlooking vast subsurface environments.