The pioneering planet-hunting Kepler Space Telescope has finally reached the end of its service life and will be switched off permanently. NASA announced today that the aging, unmanned spacecraft that has so far been responsible for the discovery of over 2,700 exoplanets has run out of the propellant needed to keep it from tumbling and must be retired.
.. Continue Reading Kepler mission ends after nine years of planet huntingCategory: Space
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