![Artist's impression of GJ 1214b](http://news.bbcimg.co.uk/media/images/58626000/jpg/_58626151_lores-1.jpg)
GJ 1214b orbits close to its host star, as this artist's impression shows.
Astronomers have confirmed the existence of a new class of planet: a waterworld with a thick, steamy atmosphere. The exoplanet GJ 1214b is a so-called "Super Earth" - bigger than our planet, but smaller than gas giants such as Jupiter.
More, from the BBC, here.
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