Artist's view of GJ1214b (Image credit: NASA, ESA, and D. Aguilar (Harvard-Smithsonian Center for Astrophysics))
The Hubble Space Telescope (Photo: NASA/ESA)
Planets orbiting two stars, giant super-Earths and worlds racked with boiling rock storms - these are just some of the galactic oddities among the more than 700 exoplanets discovered in the past 20 years. Now there's another new class of extrasolar planet to add to the list - the waterworld.
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