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      Scientific American September 1999

      Migrating Planets

      Did the solar system always look the way it does now? New evidence indicates that the outer planets may have migrated to their present orbits

      • By Renu Malhotra on September 1, 1999

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      More in the September 1999 issue of Scientific American
      • CONGO CITY
      • THE FALLOUT FROM CASSINI
      • 50, 100 and 150 Years Ago
      View Full Contents
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