The coming data releases of Gaia are expected to result in an upheaval of exoplanet science, in particular for long period giant planets (0.2MJ≤M≤25MJ). One class of exoplanets which Gaia […]
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Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
TEPCat: The Transiting Extrasolar Planet Catalogue
Transiting extrasolar planets are extraordinarily valuable for understanding the characteristics and formation of planets, because they are the only exoplanets whose physical and orbital properties can be measured to high […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Status Report
Not Earth-like Yet Temperate? More Generic Climate Feedback Configurations Still Allow Temperate Climates in Habitable Zone Exo-Earth Candidates
Earth’s climate is influenced by over a dozen feedbacks, but only three dominate its long-term climate behavior. Models of the exoplanet habitable zone (HZ) assume that this is similar for […]
Posted inAstrogeology, Exoplanets, -moons, -comets, Status Report
Fundamentals Of Interior Modelling And Challenges In The Interpretation Of Observed Rocky Exoplanets
Most our knowledge about rocky exoplanets is based on their measure of mass and radius. These two parameters are routinely measured and are used to categorise different populations of observed […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Two Temperate Earth- and Neptune-sized Planets Orbiting Fully Convective M dwarfs
As the diversity of exoplanets continues to grow, it is important to revisit assumptions about habitability and classical HZ definitions. In this work, we introduce an expanded ‘temperate’ zone, defined […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
The Persistent Thermal Anomalies In Rocky Worlds
Observing the dayside thermal emissions of rocky exoplanets provides essential insights into their compositions and the presence of atmospheres.
![[LEFT] Outgoing longwave radiation of six potentially visible hemispheres of the planet. Teegarden's Star is one of the most promising targets for the first observations of LIFE, as a non-transiting rocky planet with similar bulk properties to the Earth, and a relatively quiescent M-dwarf host star. [RIGHT} Cloud fraction averaged over all pressure levels.]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/12/Disentangling-The-Hemispheres.png?resize=1200%2C720&ssl=1)
Posted inAI - Data - Apps - Cybernetics, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Status Report
Disentangling The Hemispheres Of Teegarden’s Star b With LIFE
We use LIFEsim, a software developed by the ETH LIFE team, along with thermal emission maps obtained from a suite of three-dimensional global climate model (GCM) simulations, to explore the […]
Posted inAtmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Gaia - Planetary Perspectives, Habitable Zones, Microbiology & Virology, Status Report, Terraforming & Geoengineering, Water/Hycean Worlds & Oceanography
The Oxygen Valve on Hydrogen Escape Since the Great Oxidation Event
The Great Oxidation Event (GOE) was a 200 Myr transition circa 2.4 billion years ago that converted the Earth’s anoxic atmosphere to one where molecular oxygen (O2) was abundant (volume […]
Posted inBiosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
Projections of Earth’s Technosphere: Strategies For Observing Technosignatures On Terrestrial Exoplanets
The search for technosignatures — remotely detectable evidence of extraterrestrial technology — draws upon examples from the recent history of Earth as well as projections of Earth’s technosphere.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
A Closed-Form Analytical Theory of Non-Isobaric Transmission Spectroscopy for Exoplanet Atmospheres
Analytical models are essential for building physical intuition and guiding the interpretation of exoplanet observations by clarifying the dependencies that shape atmospheric signatures.