SEATTLE – NASA has discovered the smallest planet ever seen beyond our solar system – a rocky world just 1.4 times larger than Earth – using its planet-hunting Kepler observatory. The planet, called ...

NASA today said its star-gazing satellite Kepler has identified its first rocky planet orbiting a sun similar to our own — 560 light years from our solar system. While not in an area of space ...

A big, hot rock made its debut Tuesday. It's a planet orbiting a star 560 light-years away, and it is claimed to be the smallest planet discovered outside our solar system. Astronomers have found ...

… but our independent journalism isn’t free to produce. Help us keep it this way with a tax-deductible donation today. So many planets, so little time. Two years into a 3-1/2-year mission, NASA’s ...