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Planet Vulcan

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  • Le Verrier proposed planet Vulcan (mid 19th century)
    • Previously had "mathematically discovered" - Neptune
      • Based on Uranus deviating from its expected orbit

    • Showed the ellipse of Mercury's orbit was processing


    • Suggested an inner planet might explain Mercury's orbit
      • Einstein's theory of general relativity (1916) explained it years later

    • Named the inner planet: Vulcan
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Le Verrier By Landon Curt Noll: for the SEC 2007 conference.