For small planets orbiting within the habitable zones of their host stars, multicolour validation via photometric transit observations offers an efficient alternative to prioritize targets before intensive radial-velocity follow-up, thereby […]
climate
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Status Report, Venus
Comparison Of General Circulation Models Of The Venus Upper Atmosphere
In the context of future Venusian missions, it is crucial to improve our understanding of Venus upper atmosphere through 3D modeling, notably for spacecraft orbit computation.
Posted inAnalog Studies, Arctic / Antarctic / Alpine, Atmospheres, Climate, Weather, Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Icy Worlds, Polar / Alpine Expeditions, Press Release, Sample Return
Ice Planet Research: Six-million-year-old Antarctic Ice Offers Glimpse Into Warmer Era Of Earth’s Past
A team of scientists from several U.S. institutions, including the University of Minnesota, discovered six million year old ice in Antarctica — the oldest dated ice on the planet.
Posted inAstrogeology, Atmospheres, Climate, Weather, Mapping, Geodesy, Cartography, Bathymetry, Mars, Status Report
The Dependence of Earth Milankovitch Cycles on Martian Mass
The Milankovitch cycles of Earth result from gravitational interactions with other bodies in the Solar System.
Posted inBiosignatures & Paleobiology, Conferences and Meetings, Genomics, Proteomics, Bioinformatics, Habitable Zones, Plant Biology, Press Release
NASA Exoplanets System Science Extraterrestrial Photosynthesis Workshop
May 15-17, 2026Heidel House, Green Lake, Wisconsin, USAPreceding AbSciCon 2026 Applications for the NExSS Extraterrestrial Photosynthesis Workshop are now open. Deadline to apply is January 11, 2026.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Comets and Asteroids, Extinction events, Interstellar, Status Report
On The Coincidence Between The Close Passage Of HD7977 And The Pliocene-Pleistocene Transition
The Oort Cloud’s dynamical evolution is significantly influenced by both the galactic tide and stellar flybys.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Desert Worlds, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Mars, Missions & Hardware, Robotics/Rovers/UAVs, Status Report
Seasonal and Diurnal Variability of Atmospheric Pressure in Jezero Crater, Mars, from MEDA Measurements on the Perseverance Rover
We present an analysis of atmospheric pressure variability inside Jezero Crater on Mars based on measurements from the MEDA meteorological station aboard NASA’s Perseverance rover.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Press Release, Water/Hycean Worlds & Oceanography
General Circulation Models Of Hycean Worlds
Sub-Neptunes represent the current frontier of exoplanet atmospheric characterisation. A proposed subset, Hycean planets, would have liquid water oceans and be potentially habitable, but there are many unanswered questions about […]
![WASP-39b 3D model cross sections. Shown are the local gas temperature, Tgas [K] (left) and cloud dust-to-gas mass ratio, ρdust/ρgas (right). The values are derived from the 3D GCM results and shown as cross section across the evening (left hemisphere) and morning terminator (right hemisphere). -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/11/Exoplanet-climate-characterization.png?resize=1200%2C721&ssl=1)
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Exoplanet Climate Characterization With Transit Asymmetries — A Comprehensive Population Study From The Optical To The Infrared
Space missions (CHEOPS, JWST, PLATO) facilitate detailed characterization of exoplanets. This work provides a framework to characterize cloud and climate properties of close-in gas giants via transit depth asymmetries from […]
Posted inArctic / Antarctic / Alpine, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Cryobiology, Icy Worlds, Press Release
Six-million-year-old Ice Discovered In Antarctica Offers Unprecedented Window Into A Warmer Earth
A team of U.S. scientists has discovered the oldest directly dated ice and air on the planet in the Allan Hills region of East Antarctica.