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Carl Sagan on Tycho Brahe, Johannes Kepler, and ellipses.
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Start Time: 00:00
End Time: 9:3

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Carl Sagan on Tycho Brahe, Johannes Kepler, and ellipses

  • Time: 9:03
  • Added: 1 yr. ago
  • YouTube

Carl Sagan on Tycho Brahe, Johannes Kepler, and ellipses.

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