After nine years in deep space collecting data that indicates our sky is filled with billions of hidden planets, NASA's Kepler Space Telescope has run out of fuel. On Oct. 30, 2018, NASA announced the retirement of the spacecraft.
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This artist's concept depicts some of the planetary discoveries made by NASA's Kepler Space Telescope. Tuesday's announcement more than doubles the number of verified planets discovered by the Kepler mission.
A NASA illustration comparing the newly discovered planets to Venus and Earth. Kepler-20e is slightly smaller than both Venus and Earth. Kepler-20f is slightly larger.