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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.
The new planet, known as Kepler-413b, has an extremely irregular orbit that seems to move up and down. It also has no surface to stand on.
First "space tourist" Dennis Tito asks agency to chip in with some new rockets and cash for a 2017 manned mission. NASA says thanks, but no thanks.
The question "Is anybody out there?" grows more tantalizing with the discovery of each new far-off planet. CBS Sunday Morning talks to scientists searching for clues.
The Antares launched smoothly from Virginia's Wallops Flight Facility and released a simulated cargo ship. It's slated to follow SpaceX's Falcon 9 as a commercial ISS resupply craft.
The agency's Kepler space telescope locates three planets -- in two new planetary systems -- that are the right distance from their suns to make them potentially life-supporting.
Space station astronauts opened up the newly arrived SpaceX cargo ship early Saturday, kicking off a busy few days of work to unload the commercial spacecraft.
The space telescope picks out two confirmed Earth-size planets in orbit around a star 1,000 light years away, the smallest extra-solar planets yet discovered.
In a long-awaited milestone, astronomers using a NASA space telescope have found a roughly Earth-size world, Kepler-22b, orbiting around a sun-like star where conditions may be favorable for life.
NASA's Kepler telescope has discovered a planet that orbits two suns, just like Luke Skywalker's homeworld of Tatooine.