The artist's concept depicts Kepler-186f , the first validated Earth-size planet to orbit a distant star in the habitable zone—a range of distance from a star where liquid water might pool on the ...

Two of the earliest Earth-ish exoplanet finds are now more exciting targets in the search for habitable worlds beyond this rock. Eric Mack has been a CNET contributor since 2011. Eric and his family ...

Kepler-186f orbits an M dwarf star in the constellation Cygnus. More importantly, it's the first confirmed Earth-size, potentially habitable planet elsewhere in the universe. Eric Mack has been a CNET ...

Technicians working inside the Astrotech Space Operations facility near NASA's Kennedy Space Center look over the Kepler spacecraft soon after it arrived in Florida in preparation for launch. [Read ...

NASA's planet-hunting Kepler space telescope has just spotted Earth's cousin. Its next big find may be Earth's twin. On Thursday (April 17), astronomers announced the discovery of Kepler-186f, the ...

Earth, meet your distant cousin. The Kepler space telescope has turned up a potentially water-bearing world nearly as small as our planet. The planet is the smallest one found in any star’s habitable ...

Two exoplanets in the habitable zones of their stars probably have stable climates and regular seasons, scientists have discovered. One of them, astronomers believe, is roughly the size of Earth. In ...

Imagine walking through a forest where every leaf is deep red. On Kepler-186f, that’s not science fiction - it’s biology playing by a different rulebook.

NASA’s Kepler spacecraft has discovered a “cousin” of Earth 1,400 light-years away. The exoplanet Kepler 452b orbits a sunlike star at about the same distance as Earth orbits the sun, scientists ...

LOS ANGELES (AP) -- Astronomers have discovered what they say is the most Earth-like planet yet detected -- a distant, rocky world that's similar in size to our planet and exists in the Goldilocks ...

As the highly successful Kepler spacecraft ends its 9-year mission, humanity can look back at an instrument that greatly expanded our knowledge of planetary systems around other stars and discovered ...