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NASA's Kepler Space Telescope has discovered the first validated Earth-size planet orbiting in the habitable zone of a distant star, an area where liquid water might exist on its surface. The planet, Kepler-186f, is ten percent larger in size than Earth and orbits its parent star, Kepler-186, every 130 days. The star, located about 500 light-years from Earth, is classified as an M1 dwarf and is half the size and mass of our sun. For more information about this discovery, please visit http://www.nasa.gov/kepler For more information about NASA Ames, please visit http://www.nasa.gov/ames

Credit: NASA Ames