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Proving ellipse shape of earth orbit?

  1. Mar 7, 2006 #1
    hi, i am secondary student, can anybody help me to find a site in proving ellipse shape of earth orbit? and also those site which help you in understanding Principia?
  2. jcsd
  3. Mar 7, 2006 #2


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    Staff: Mentor

  4. Mar 7, 2006 #3
    search for kepler's 3 laws proofs. one of them is for the elliptic.
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