Six hundred and thirty-five light years away from Earth, there is a world that seems to promise something almost unimaginable: a planet covered in a vast liquid ocean, where survival might actually be ...

— -- Astronomers on Monday reported the discovery of an Earth-like planet outside the solar system whose size and distance from its own star put it in the "habitable" zone and make for a surface ...

It's several times larger than Earth and 600 light years away, but a newly discovered planet, Kepler-22b, is also said to be 72 degrees--and NASA's Kepler mission has named it as a planet that's just ...