water-rich atmosphere Archives

Left: Radiative cooling rates for TOI-238 b: the H-He atmosphere with solar metallicity (top panel) and the atmosphere enriched in metals 200 times over solar metallicity (bottom panel). The plot format matches that of Fig. 2. Center: Volume heating rates for TOI-238 b: the H-He atmosphere with solar metallicity (top panel) and the atmosphere enriched in metals 200 times over solar metallicity (bottom panel). The plot format matches that of Fig. 3. Right: Population of hydrogen species and heavy (metal) ions: the H-He atmosphere with solar metallicity (top panel) and the atmosphere enriched in metals 200 times over solar metallicity (bottom panel). The plot format matches that of Fig. 4. -- astro-ph.EP

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Ice Giant, Imaging & Spectroscopy, Status Report

Escape Of Water- And Metal-enriched Atmospheres From Compact Hot mini-Neptunes With CHAIN

by Keith CowingJune 3, 2026June 3, 2026

Recent observations reveal that atmospheric compositions of close-in sub-Neptunes are diverse and can differ strongly from pure H/He-dominated.

Evolution of thermal properties of GJ 486b. The two plots at the top denote the stellar luminosity evolution (bolometric and XUV) and the mantle potential temperature evolution for GJ 486b. The yellow and orange background denote the time evolution before and after the complete solidification of the planet, respectively. The bottom two plots illustrate the planet radius, melt fraction, and viscosity evolution till the point of complete solidification. The dotted lines denote the core radius (rc), upper-lower mantle boundary radius (rulmb) and the planet radius (Rp), all normalized to planet radius. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Press Release, Water/Hycean Worlds & Oceanography

Unveiling the Interior Structure and Thermal Evolution of Super-Earth GJ 486b

by Keith CowingJanuary 21, 2025January 21, 2025

Recent ground- and space-based surveys have shown that planets between Earth and Neptune in size, known as “super-Earths,” are among the most frequently found planets in the Galaxy.

water-rich atmosphere

Escape Of Water- And Metal-enriched Atmospheres From Compact Hot mini-Neptunes With CHAIN

Unveiling the Interior Structure and Thermal Evolution of Super-Earth GJ 486b

Miraflores Butte On Mars

Ocean World Exploration: 2026 American Samoa ROV + Mapping Exploration

Development Of An Adaptive Optics Testbed At MPIA For The ELT/Planetary Camera And Spectrograph (PCS)

Exploring Long-period Architectures: Four New Planet Candidates from Kepler with Periods >342 days

The Selfish Ribosome