![Mass and radius for a number of potentially habitable ocean worlds. The bullet points show identified ocean worlds: listed from bottom to top: HD 11505b, WASP 35, TOI 157, TOI 1452b, KELT 10b, HD 80883b, HD 221585b, HIP 67537b, K2-18b, Kepler 1980b, HD 50499b, Kepler 1766b, HD 50499c. The green curve gives the mass-radius relation for planets with a water content of > ∼ 30 % (by mass) from [40]. The arrows (and black crosses [right-most one is white]) give the simulation atmosphere models. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/10/A-Systematic-North-South-Asymmetry1.png?resize=1200%2C725&ssl=1)
Planetary obliquity (axial tilt) plays an important role in regulating the climate evolution and habitability of water-covered planets.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography