The critical first step in the search for life on exoplanets over the next decade is to determine whether rocky planets transiting small M-dwarf stars possess atmospheres and, if so, […]
astro-ph.EP
Posted inBiosignatures & Paleobiology, Exoplanets, -moons, -comets, Status Report, Water/Hycean Worlds & Oceanography
Conclusive Evidence For A Population Of Water Worlds Around M-dwarfs Remains Elusive
The population of small, close-in exoplanets is bifurcated into super-Earths and sub-Neptunes. We calculate physically motivated mass-radius relations for sub-Neptunes, with rocky cores and H/He dominated atmospheres, accounting for their […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
A Long-period Planet Around GJ 1151 Measured With CARMENES And HARPS-N Data
Detecting a planetary companion in a short-period orbit through radio emission from the interaction with its host star is a new prospect in exoplanet science.
Posted inBiosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Plant Biology, Press Release, TRAPPIST-1
Photosynthetic Fluorescence From Earth-Like Planets Around Sun-Like Aand Cool Stars
Remote sensing of the Earth has demonstrated that photosynthesis is traceable as the vegetation red edge (VRE), which is the steep rise in the reflection spectrum of vegetation, and as […]
Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Press Release
The Abundance of Belatedly Habitable Planets And Ambiguities In Definitions Of The Continuously Habitable Zone
A planet’s history dictates its current potential to host habitable conditions and life. The concept of the Continuously Habitable Zone (CHZ) has been used to define the region around a […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Press Release, Water/Hycean Worlds & Oceanography
Redox State And Interior Structure Control On The Long-term Habitability Of Stagnant-lid Planets
A major goal in the search for extraterrestrial life is the detection of liquid water on the surface of exoplanets.
Posted inBiosignatures & Paleobiology, Exoplanets, -moons, -comets, Press Release
A Rocky Exoplanet Classification Method And Its Application To Calculating Surface Pressure And Surface Temperature
With over 5,000 exoplanets currently detected, there is a need for a primary classification method to prioritise candidates for biosignature observations.
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Optical Properties Of Organic Hazes In Water-rich Exoplanet Atmospheres: Implications For Observations With JWST
JWST has begun its scientific mission, which includes the atmospheric characterization of transiting exoplanets.
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release
A Gaian Habitable Zone
When searching for inhabited exoplanets, understanding the boundaries of the habitable zone around the parent star is key.
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Enceladus, Europa, Ganymede, Icy Worlds, Mars, Missions & Hardware, Press Release, Water/Hycean Worlds & Oceanography
Enabling Ice Core Science On Mars And Ocean Worlds
Ice deposits on Earth provide an extended record of volcanism, planetary climate, and life.