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 ...

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 ...

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 ...

New evidence has surfaced suggesting that exoplanet Kepler-186f could have changing seasons and a climate, much like Earth — a discovery that’s exciting astronomers and leading to calls for newer, ...

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 ...

Scientists analyzing data from the planet-hunting Kepler space telescope have chalked up another first, finding an Earth-size world orbiting in the habitable zone of its parent star, researchers ...

Kepler-186f could be Earth-like in many ways—but its light isn’t. Here’s why plants there wouldn’t be green, and what that reveals about life on other worlds Missing hiker found in ‘bad shape' used ...

On Earth, plants are green thanks to our Sun’s light—but Kepler-186f orbits a cooler, redder star. Here’s why alien vegetation might evolve with deep red hues instead of green. Senate Democrats, ...