Earth’s sky is only one version of a cosmic phenomenon. Other planets offer skies filled with strange colors, thick atmospheres, and violent storms. This video takes you on a breathtaking journey ...

A new study led by the Harvard-Smithsonian Center for Astrophysics (CfA) and the Galileo Project proposed an All-Sky Infrared Camera called Dalek to scan Earth’s skies for signs of aliens or ...

Could hazy exoplanet atmospheres be hiding important clues about alien worlds? Many potentially habitable planets orbit small, active stars that frequently unleash powerful bursts of ultraviolet ...

Not since the days of Erich von Daniken's "Chariots of the Gods," director Steven Spielberg's "Close Encounters of the Third Kind," and publisher Bob Guccione's "Omni" magazine has there been this ...