NASA’s Kepler Discovers First Earth-Size Planet In The Habitable Zone of Another Star

Astronomers have discovered the first Earth-size planet orbiting a star in the “habitable zone“ -- the range of distance from a star where liquid water might pool on the surface of an orbiting planet. The discovery of Kepler-186f confirms that planets the size of Earth exist in the habitable zone of stars other than our sun. For more information about the Kepler mission, please visit For more information about NASA Ames, please visit