: The planet possesses a massive water layer—sometimes hundreds of kilometers deep—far exceeding Earth's water-to-mass ratio. Scientific Significance
: At extreme temperatures and pressures, the boundary between liquid ocean and thick atmosphere disappears, creating a "supercritical" fluid state. old mature hot wet
Researchers use these models to understand the As these planets age, they may lose their water to space due to photolysis (where light breaks down water molecules) and atmospheric escape. A "hot and wet" planet is often on the brink of becoming a "dry" world, similar to what may have happened in Venus's distant past. Related Study Areas : The planet possesses a massive water layer—sometimes