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Bruce Murray Space Image Library

Kepler-186f: A Second Earth

Kepler-186f: A Second Earth
Kepler-186f: A Second Earth The artist’s concept depicts Kepler-186f, the first validated Earth-size planet orbiting a distant star in the habitable zone—a range of distances from a star where liquid water might pool on the surface of an orbiting planet. Kepler-186f resides in the Kepler-186 system about 500 light-years from Earth in the constellation Cygnus. The discovery of Kepler-186f confirms that Earth-size planets exist in the habitable zone of other stars and signals a significant step closer to finding a world similar to Earth. NASA / Ames / JPL-Caltech / T. Pyl