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Published April 17, 2014, 12:00 AM

Five Planet Star System


The diagram compares the planets of our inner solar system to Kepler-186, a five-planet star system about 500 light-years from Earth in the constellation Cygnus. The five planets of Kepler-186 orbit an M dwarf, a star that is is half the size and mass of the sun.

(NASA/SETI Institute/JPL-Caltech)

Read the article: NASA discovers Earth-sized planet that may sustain life