Kepler-22 System

Contains the smallest planet in the habitable zone around a star at the time of its discovery by Kepler. Orbits around a sun-like star about every 290 days. It is about 2.4 times the radius of Earth, though its mass has not yet been measured, so it has not been confirmed to be rocky. Depicted in art as blue with green clouds, the Scientific Exoplanets Renderer did not compute that it was habitable though. It may have a Venus-like green house.

Kepler 22 System Web Pages

 * Wikipedia