[NASA Exoplanet Archive]. This week, the archive welcomes eight new planets:Ā CD-35 2722 B b,Ā HD 50554 c & d,Ā KMT-2025-BLG-0975L b,Ā KMT-2025-BLG-1160L b,Ā TOI-3053 b,Ā TOI-3278 b, andĀ TOI-4409 b. We also bid adieu to WASP-126 […]
exoplanet
![Set B latitudinal annual temperature variation of Gl 514 b after 10 Myr evolution for two different orbital configurations. The nearly horizontal contours after ā¼5 Myr indicate the model prediction has stabilized. Left panel: surface temperature (in Ā°C) for e = 0.45. Right panel: e = 0.62. Note that the color bar for the right panel is not the same due to the large difference in surface temperature between each simulation.-- [Planetary Science Journal]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Climates.png?resize=1200%2C722&ssl=1)
Posted inHabitable Zones
Climates Of Gl 514 b
[Planetary Science Journal] The continuous discovery of exoplanets, each with distinctive stellar and planetary properties, along with the development of higher resolution ground and space telescopes has positioned climate evolution […]
![Panel (a): HR diagram of the OC members with detections. The blue solid line is the fitting results of MS. green dashed lines represent the upper and lower bounds of the MS fitted with a Ā±0.5 offset, and the red dashed line is the same sequence shifted upwards by 2. The color bars represent the stellar ages. Panel (b): HR diagram of the field stars with detections. Panel (c): The Galactic distribution of the selected sources from the detected OC members. Panel (d): The Galactic distribution of the selected sources from the detected field stars. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Evolution-of.png?resize=1200%2C720&ssl=1)
Posted inHabitable Zones
Evolution of Stellar Activity and Habitable Zone (EATEN): III. X-ray Activity of Dwarfs in Open Clusters and Field Stars
[astro-ph.SR] Stellar X-ray emission serves as a direct diagnostic of coronal activity, which is fundamentally linked to coronal heating processes. It also strongly influences the atmospheres and long-term habitability of […]
Posted inTRAPPIST-1
Radial Velocity Detection Of The TRAPPIST-1 Planetary System With SPIRou And NIRPS
[astro-ph.EP]. The TRAPPIST-1 system is well-known for its seven transiting Earth-sized exoplanets. It has been extensively studied and characterized, notably with transit timing variations (TTVs) to precisely measure the mass […]
Posted inAstrogeology
Planet Formation at Cosmic Dawn: Planetesimals in H2O-rich Disks around Low-mass Stars
[The Astrophysical Journal Letters]. Primordial, or Population III (Pop III), supernovae (SNe) were the first nucleosynthetic engines in the Universe, forging the heavy elements required for the later formation of […]
![Simulated ablation heights of IDPs in exoplanet atmospheres. Our fiducial simulation is marked in red. Solid and dashed curves signify IDP compositions of MgSiO3 and Fe, respectively. The black dashed curve on the left most panel shows the approximation of the mass injection function Fv(p) for an arbitrary IDP mass flux for comparison with the ablation profiles. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Interplanetary-Dust.png?resize=1200%2C721&ssl=1)
Posted inAstrogeology
Interplanetary Dust Ablation Seeds Silicate Clouds in Exoplanet Atmospheres
[astro-ph.EP] Interplanetary dust particles (IDPs) are present throughout the Solar System, with Earth experiencing a mass flux of roughly 100 tonnes of IDPs per day.
NASA Ames AI/ML Seminar: Harnessing Trust: Agentic AI Workflow in Exoplanetary Climate Modeling
JOIN THE AI/ML SEMINAR SERIES Everyone is invited to the monthly artificial intelligence and machine learning virtual seminar hosted by the AI-Astrobiology Initiative at NASA Ames Research Center. Previously recorded […]
![Left: Average ocean fraction, calculated assuming a seawater freezing point of ā1.8Ā°š¶ for Cases 1 and 3 and 0Ā°š¶ for Case 2. White shows the ice, and blue ocean. Middle: The mean near-surface air temperatures. Shown within the black contours are the regions where these vary between above and below freezing over the course of a single Earth year. Right: The mean surface temperatures. Also shown within the black contours are the regions where these vary between above and below freezing over the course of a single Earth year: these regions are narrower than the air āperifreezing zoneā.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Sea-Ice.png?resize=1200%2C720&ssl=1)
Posted inWater/Hycean Worlds & Oceanography
Sea Ice As An Origin Of Life Location For Hycean And Ocean Worlds
[astro-ph.EP] Water worlds with potential deep oceans are at the forefront of currently observable exoplanetary habitability.
![RMS vs bin-size of the residuals from our TTV fits (see Section 4.1). The four panels show the 2x2 different reduction-likelihood pairings considered in this work. The two jitter treatments find binning behavior worse than that expected from pure Gaussian noise (dashed line), and instead have a slope of ā¼ ā 1/3, similar to other NIRSpec PRISM results (e.g. Kipping et al. 2025). The inclusion of a GP to absorb time-correlated noise greatly reduces the slopes, as again expected.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/JWST-Excludes.png?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
JWST Excludes Exomoons Down to 0.1 Earth Radii Around a Rocky, Temperate Exoplanet
[astro-ph.EP] To date, even with JWST, it has not been possible to test for exomoons as small as the Moon. Only two reported searches for exomoons around bound planets have […]
Posted inExoplanets, -moons, -comets
The Metallicity Of Giant Exoplanets Around Low-mass Stars And How Ariel Can Help
[astro-ph.EP] Giant planets orbiting low-mass stars represent a unique population of giant planets that can be studied to constrain planet formation theory. Surveys of transiting giant exoplanets around M-dwarfs (GEMS) […]