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 ...

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 ...

Scientists have identified 45 Earth-like exoplanets that are the strongest known candidates for hosting extraterrestrial life.

Artist's concept shows Kepler-186f , the first validated Earth-size planet to orbit a distant star in the habitable zone. ( Image courtesy NASA Ames/SETI Institute/JPL-Caltech) WASHINGTON, DC, April ...

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 ...

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 ...

NASA's Kepler program has a found a planet similar to Earth in size and distance to its star, and while it's not quite a twin, some scientists are calling it a "cousin." The planet, called Kepler 186f ...

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 ...

Kepler Space Telescope found a lot of data before it malfunctioned in 2013; scientists are now going back through it. With much fanfare, NASA announced this week that its Kepler Space Telescope had ...

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 ...