[Environmental Microbiology] Atmospheric transport is hypothesized to be the primary vector connecting isolated Antarctic terrestrial habitats to global microbial pools, yet the mechanisms governing this connectivity still have important gaps.
atmosphere
![Set B latitudinal annual temperature variation of Gl 514 b after 10 Myr evolution for two different orbital configurations. The nearly horizontal contours after ∼5 Myr indicate the model prediction has stabilized. Left panel: surface temperature (in °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 […]
Posted inSpace Weather & Heliophysics
Cosmic Radiation at Flight Altitudes Rises When the Sun Is Less Active
[Hebrew University of Jerusalem]. Radiation from space is constantly entering Earth’s atmosphere, but how much of it reaches the altitudes used by commercial aircraft depends not only on height and […]
![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.
![Left: Average ocean fraction, calculated assuming a seawater freezing point of −1.8°𝐶 for Cases 1 and 3 and 0°𝐶 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 ‘perifreezing zone’.-- [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.
Posted inOrigin & Evolution of Life
Auroral Belts As Magnetically Localized Reactors For Prebiotic Chemistry On Early Earth
[Biosystems] Most models of prebiotic chemistry emphasize globally distributed or widely acting energy sources, including ultraviolet radiation, lightning, impacts, and energetic particles.
Posted inExoplanets, -moons, -comets
Two Extremely Irradiated Volatile-rich Sub-Neptunes With Companions In The TOI-426 And TOI-1839 Systems: Insights Into Arrival And Survival Near The Lower Edge Of The Neptunian Desert
[astro-ph.EP] Using TESS photometry and 147 HARPS radial velocities, we confirm two extremely irradiated, volatile-rich sub-Neptunes near the lower edge of the Neptunian desert: TOI-426 b and TOI-1839 b, orbiting […]
Posted inAtmospheres, Climate, Weather
Contrasting C/O Ratios in Uranus and Neptune From Disequilibrium Chemistry: A Clue To Distinct Evolutionary Pathways?
[astro-ph.EP] The formation of Uranus and Neptune remains poorly constrained largely due to uncertain deep elemental abundances. Carbon monoxide (CO), a disequilibrium species in the upper troposphere, provides an indirect […]
Posted inIcy Worlds
Amplified Cooling Of Snowball Earth From A Salt-albedo Feedback
[Climate of the Past] It is believed that the atmospheric circulation on Snowball Earth produced a net ablation zone exposing bare sea ice.
![Schematic of the flow-map encoder–operator–decoder architecture used to emulate chemical kinetics. The encoder maps the current normalized input state (and global parameters) to a latent space. The latent dynamics operator evolves this latent state using the time step and global parameters, and the decoder reconstructs the predicted future normalized species state. Optional residual connections can be applied in latent space and/or on the normalized model outputs.-- astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Accelerating.png?resize=1200%2C718&ssl=1)
Posted inExoplanets, -moons, -comets
Accelerating Chemical Kinetics For Exoplanet Atmospheres Using Neural Networks
[astro-ph.EP] Observations increasingly reveal the coupled radiative, chemical, and dynamical processes that shape exoplanet atmospheres. Interpreting these atmospheres requires models that can capture this complexity.