The most detailed map of a small, rocky 'super Earth' to date reveals a planet almost completely covered by lava, with a molten 'hot' side and solid 'cool' side.

New research led by Yale University scientists suggests that a rocky planet twice Earth’s size orbiting a nearby star is a diamond planet. “This is our first glimpse of a rocky world with a ...

Astronomers have searched for years for rocky planets beyond our solar system with an atmosphere - a trait considered essential for any possibility of harboring life. Well, they finally seem to ...

The three other potential planets orbiting Barnard's star all apparently are rocky and smaller than Earth, ranging from 20-30% of Earth's mass. The hope is that at least one of these may be in the ...

New research suggests that a rocky planet twice Earth's size orbiting a nearby star is a diamond planet. The planet -- called 55 Cancri e -- has a radius twice Earth's, and a mass eight times ...