Liquid is a fundamental requirement for life as we understand it, but whether that liquid has to be water is not known.
astro-ph.EP
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Mapping, Geodesy, Cartography, Bathymetry, Mars, Status Report, Water/Hycean Worlds & Oceanography
A Global High-Resolution Hydrological Model to Simulate the Dynamics of Surface Liquid Reservoirs: Application on Mars
Surface runoff shapes planetary landscapes, but global hydrological models often lack the resolution and flexibility to simulate dynamic surface water bodies beyond Earth. Recent studies of Mars have revealed abundant […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Status Report
Water Enrichment Of Forming Sub-Neptune Envelopes Limited By Oxygen Exhaustion
The interaction between a magma ocean and a primordial atmosphere is increasingly recognized as a key process in shaping planetary envelope compositions.
Posted inBrown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Status Report, Stellar Cartography
A Universal Brown Dwarf Desert Formed Between Planets And Star
Giant planets and brown dwarfs play a crucial role in star and planet formation, as they are situated at the boundary between planets and stars with uncertain formation mechanisms.
Posted inBrown Dwarfs, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
A Universal Brown Dwarf Desert Formed Between Planets And Stars
Giant planets and brown dwarfs play a crucial role in star and planet formation, as they are situated at the boundary between planets and stars with uncertain formation mechanisms.
Posted inBiogeochemical Cycles & Geobiology, Desert Worlds, Gaia - Planetary Perspectives, Habitable Zones, Icy Worlds, Mars, Status Report, Terraforming & Geoengineering
Modelling The Long-term Impacts Of Artificial Warming On The Martian Water Cycle And Surface Ice Distribution
Recent papers by Ansari et al. (2024, Science Advances 10, eadn4650) and Richardson et al. (2025, arXiv eprint 2504.01455) have suggested that global warming of the Martian surface (‘terraforming’) by […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
TOI-1080 b: A Temperate, Rocky Planet Orbiting A Quiet M4V Host
We present the detection and validation of a small, temperate transiting exoplanet orbiting TOI-1080 every 3.9652482+0.0000014−0.0000015 days. The host is a quiet M4V star at 25.6 pc.
Posted inStatus Report, Terraforming & Geoengineering
Terraforming Mars: Mass, Forcing, And Industrial Throughput Constraints
Terraforming Mars can be evaluated with a small set of system-level feasibility constraints linking (i) target pressures and compositions to required atmospheric inventories, (ii) target surface temperatures to required radiative […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
Rotational Doppler Cartography Of Technosignatures On Unresolved Planets
The discovery of many Earth-like planets has renewed interest in whether life and technological civilizations exist elsewhere.
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Comets and Asteroids, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Missions & Hardware, Planetary Protection & Biosafety, Sample Return, Status Report
Bundle Adjustment Of Hayabusa2’s ONC Images And Controlled Color Mosaic Map Of Ryugu
JAXA’s Hayabusa2 mission successfully returned samples from the asteroid Ryugu in December 2020. It executed two touchdowns to collect the surface and subsurface materials, one close to the crater created […]