April 17, 2014 Andy Cush

Above is an artist’s rendering of Kepler-186f, the first Earth-sized planet discovered in a star’s “habitable zone” — the range at which a planet could contain liquid water. Astronomers using NASA’s Kepler telescope found the planet in the constellation Cygnus, 500 lightyears from Earth, and believe it has a rocky surface. “We know of just one planet […]

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