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 […]
climate
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.
Posted inArctic / Antarctic / Alpine
Icy Ocean Planet Research: NASA ROSES-25 Amendment 71: New Opportunity A.16 Cryosphere
[NASA]. A.16 Cryosphere solicits high-impact efforts focused on sea ice, ice sheets, and glaciers. The expectation is that proposed investigations will use the wealth of data from NASA satellites and […]
Posted inVenus
The Lost Oceans Of Venus
[Earth and Planetary Science Letters] Whether Venus once had oceans and, if so, when it lost them are critical issues in the understanding of habitability on exoplanets, as well as […]
![Stellar influence on planetary habitability. Figure credit: solar images from NASA/ESA and KPNO/NSO/AURA/NSF, background pictures generated through OpenAI’s image-generation system (i.e., Adobe Firefly and ChatGPT Images 2.0). Illustration: K. Herbst - [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/StellarActivity.jpg?resize=1200%2C720&ssl=1)
Posted inHabitable Zones
Stellar Activity, Exoplanet, Habitability, Planetary Atmospheres
[astro-ph.EP] This chapter will review the deep connection of planetary habitability and stellar irradiation. We present the long-term stellar evolution as one of the drivers of atmospheric escape and climate […]
Posted inExoplanets, -moons, -comets
Atmospheric Escape Rates of Planets in Stellar Tidal Fields from 3-D Hydrodynamic Simulations
[astro-ph.EP] Thermally driven atmospheric escape, including photo-evaporation and core-powered mass-loss, plays a key role in shaping the evolution of close-in exoplanets, yet most current models rely on simplified one-dimensional descriptions […]
![(A) Summary interpolation of the extent of bedrock geologic units based on in situ mapping. The width of the mapping corridor is ∼120 m. White dots are positions occupied during the traverse for which images are available for mapping. (B) Summary of interpreted stratigraphic relationships between identified lithologic units along the Jezero crater floor traverse (A and B adapted from Crumpler et al., 2023; Fig. 19). (C) Orbital image of Jezero crater floor with the path of the Perseverance overlaid in white. (D) Inset of the crater floor campaign, with all Máaz abrasion patches shown (Guillaumes, Montpezat, Bellegarde, and Alfalfa), and the OEB (Octavia E. Butler) landing site indicated. The Guillaumes and Alfalfa abrasions are highlighted, as they are the focus of this article (altered from NASA). -- [Astrobiology (journal)]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/The-Possible-Aqueous.png?resize=1200%2C718&ssl=1)
Posted inMars
The Possible Aqueous Origins of Manganese Alteration Minerals in the Máaz Formation of Jezero Crater
[Astrobiology (journal)] Home to a lake around 4 billion years ago, Jezero Crater is a unique location to study the interplay between igneous processes and aqueous alteration on ancient Mars.
Posted inMars
First Study Hints Solar Storms May Alter The Weather During Martian Dust Storms
[Royal Astronomical Society] Solar storms may affect weather on Mars when they strike at the same time as major Martian dust storms, a new study has suggested for the first […]
Posted inHabitable Zones
When Stabilizing Feedbacks Wreak Havoc In Habitable Planets: Chaos At The Freezing Point In A Four-Feedback Climate Model
[astro-ph.EP] The long-term habitability of Earth-like planets is governed by the balance of positive and negative climate feedbacks that regulate surface temperature and atmospheric composition.
Posted inHabitable Zones
Water Planet Habitability: Sea Level Is Linked To Earth’s Carbon Thermostat
[Syracuse University] Earth has a natural thermostat that has kept the planet habitable for more than a hundred million years. Scientists have struggled to fully explain how it works, but […]