Nearby Super-Earth May Be a Waterworld

SPACE.com -- Nearby Super-Earth May Be a Waterworld
"The planet is about three times the size of Earth and about 6.5 times
as massive. It is the second smallest planet discovered outside of our
solar system to date, trailing behind only CoRoT-7b, which is 1.7 times
Earth's size and about five times as massive.

GJ 1214b is rare among known rocky exoplanets because it partially
eclipses, or transits, its star as seen from Earth."
http://www.space.com/scienceastronom...tmosphere.html