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      Knowledge is Power

      Scientific American April 1959

      The Solar System beyond Neptune

      Pluto, our sun's most remote and mysterious planet, may once a satellite of Neptune. Current theories about its origin provide new clues to the genesis of the solar system

      • By Owen Gingerich on April 1, 1959

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      More in the April 1959 issue of Scientific American
      • Germination
      • Mathematical Games
      • The Mohole
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