Scientists analyzing data from the Kepler space telescope have discovered a first: an Earth-size planet orbiting in the habitable zone of its parent star, researchers announced Thursday. The planet is ...

NASA’s Kepler mission has confirmed its first planet in the “habitable zone,” the region where liquid water could exist on a planet’s surface. Kepler also has discovered more than 1,000 new planet ...

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A decade after being found, the first exoplanet candidate spotted by the Kepler space telescope has been confirmed as a real world. The planet orbits a star initially dubbed KOI 4, for Kepler Object ...

The alien planet Kepler-186f is a planet only slightly larger than Earth orbiting inside the habitable zone of its red dwarf star. See images and photos of the Kepler-186f planet discovery in this ...

The new discovery of six alien planets orbiting a sunlike star may be only a small part of the data released Wednesday from NASA's planet-hunting Kepler mission, but it is significant as the most ...

NASA's Kepler mission has confirmed its first planet in the "habitable zone," the region around a star where liquid water could exist on a planet's surface. Kepler also has discovered more than 1,000 ...

Despite being currently offline, the Kepler space telescope is still turning up surprises. One of them is an Earth-like planet that’s so large that astronomers at the Harvard-Smithsonian Center for ...