This artist's conception shows the inner four planets of the Gliese 581 system and their host star, a red dwarf star only 20 light years away from Earth. (Image credit: Lynnette Cook, NASA)
The planet, dubbed "Gliese 581g," is the sixth known planet found orbiting the red dwarf known as Gliese 581, found within the constellation of Libra. The planet was found by teams at the University of California (UC) Santa Cruz, and the Carnegie Institution of Washington, after nearly a decade of observations using the W. M. Keck Observatory in Hawaii.