Sub-Neptune exoplanets
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography

Biogenic Sulfur Gases As Biosignatures On Temperate Sub-Neptune Waterworlds

by Keith Cowing

Theoretical predictions and observational data indicate a class of sub-Neptune exoplanets may have water-rich interiors covered by hydrogen-dominated atmospheres. Provided suitable climate conditions, such planets could host surface liquid oceans.

Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Icy Worlds, Imaging & Spectroscopy, Neptune, Status Report

Atmospheres As Windows Into Sub-Neptune Interiors: Coupled Chemistry And Structure Of Hydrogen-Silane-Water Envelopes

by Keith Cowing

Sub-Neptune exoplanets are commonly hypothesized to consist of a silicate-rich magma ocean topped by a hydrogen-rich atmosphere. Previous work studying the outgassing of silicate material has demonstrated that such atmosphere-interior […]

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