Earth vs. K2 18b - The Ocean Planet In 2023, an investigation with NASA’s James Webb Space Telescope into K2-18b revealed this planet could be a Hycean exo-planet, a type of exo-planet that has a hydrogen-rich atmosphere and a water ocean-covered surface. "Earth vs. K2 18b - The Ocean Planet" by Universe Dimensions #earth #ocean #water #k218b #exoplanets #alienworld #space #astronomy #astrophysics #universedimensions