GJ 1214 b
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GJ 1214 b is an exoplanet that orbits the star GJ 1214, discovered in December 2009. Its parent star is 48 light-years from the Sun, in the constellation Ophiuchus. At the time of its discovery, GJ 12
Artist's impression of the planet with a hazy steam atmosphere
Artist's impression of GJ 1214 b (foreground), illuminated by the red light of its parent star (center)
This artist's impression shows how GJ 1214 b may look as it transits its parent star. It is the second super-Earth for which astronomers have determined the mass and radius, giving vital clues about its structure.
Ocean world
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An ocean world, ocean planet, water world, or water planet is a type of planet or natural satellite that contains a substantial amount of water in the form of oceans, as part of its hydrosphere, eithe
Earth's surface is dominated by the ocean, which forms 71% of Earth's surface. Thus, Earth can be considered a water world, although not a fully oceanic world.
Diagram of the interior of Enceladus. Ice crust Global ocean Rocky core The southern polar region shows active jets.
A set of exoplanets of varying size containing water, compared with the Earth (artist concept; 17 August 2018)
Atacama Large Millimeter Array image of HL Tauri, a protoplanetary disk