The exoplanet, known as GJ 1214 b, was detected by the Hubble Space Telescope and dubbed a "waterworld" by the science community.

GJ 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 - ...