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Irish Star on MSNNASA amazed by never-before-seen 'waterworld' planet eight times bigger than EarthThe exoplanet, known as GJ 1214 b, was detected by the Hubble Space Telescope and dubbed a "waterworld" by the science community.
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Astronomers thought mini-Neptunes had atmospheres with water or hydrogen. This one has neitherGJ 1214b is a strange planet. It has a radius about 2.7 times that of Earth and a mass roughly eight times greater. It’s bigger than a rocky planet, but not big enough to be a gas giant.
The extrasolar planet, now named GJ 1214b, is about 40 light-years away. It orbits a red dwarf star. It is the only known "Super-Earth" exoplanet - worlds that have masses between Earth and Neptune - ...
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