Imagine the potential for life and unique environmental conditions if the exoplanet Kepler-22b were located within our solar system.

An artist's concept of a planetary lineup, featuring five exoplanets that may be similar to Earth: (L to R) Kepler-22b, Kepler-69c, Kepler-452b, Kepler-62f and Kepler-186f, with Earth on the far ...

Scientists have devised a new method for mapping the spottiness of distant stars by using observations from NASA missions of ...

MOUNTAIN VIEW, Calif. — NASA's planet-hunting Kepler spacecraft has confirmed the discovery of its first alien world in its host star's habitable zone — that just-right range of distances that ...

Two years after NASA's Kepler Space Telescope stirred up speculation about the possibility of alien life, NASA is set to make an announcement about the planet-hunting mission.