PASADENA, Calif. — NASA’s Kepler mission has discovered two new planetary systems that include three super-Earth-size planets in the “habitable zone,” the range of distance from a star where the ...

Astronomers studying data from NASA's retired Kepler space telescope discovered a new system of seven "scorching" planets orbiting a distant star that is bigger and hotter than the sun, the space ...

Space-watchers saw the handwriting on the wall months ago, but now it’s official: NASA’s Kepler spacecraft, by far the most successful planet-hunting telescope in history, isn’t coming back. Engineers ...

NASA’s premier planet-hunting space telescope is out of gas. The Kepler space telescope can no longer search for planets orbiting other stars, ending its nearly 10-year mission, officials from the ...

Earth just got a new cousin. NASA’s Kepler telescope has discovered a new planet that is the closest mimic of our celestial home ever known. Stare at the constellation Cygnus in the night’s sky, and ...