Sub-Neptune exoplanets unlikely to be water-rich ocean worlds, researchers say
Astrobitica
September 18, 2025 (Last updated: September 18, 2025) 1 minute read
An exoplanet orbiting a dwarf star 124 light-years from Earth made headlines around the world in April 2025. Researchers at the University of Cambridge reported that planet K2-18b could be a marine world with a deep, global ocean teeming with life.