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• An historical timeline
  
  
• Tycho Brahe
  
  
• Tycho's "Hybrid" Solar System
  
  
• Johannes Kepler (with Tycho's portrait)
  
  
• Kepler's "Dream" Solar System
  
  
• Where did this come from? . . . Listen carefully - he was lecturing on "Astrology"! This was how he earned money.
  (from Cosmos, "Harmony of the Worlds")
  
  
• Ellipses with Various Eccentricities
  
  
• The Actual Shapes of the Planetary Orbits
  
  
• Kepler's Second Law
  
  
• Planetary Motion from PhET (lower planet mass and follow CoM)
  
  
• Planetary Orbital Periods with distances to scale
  
  
• James Cook and his notes from 1769
  
  
• The Transit of Venus of June 2004, animated
  
  
• Carl Sagan on Tycho and Kepler from "Cosmos: The Harmony of the Worlds" (~12 min)
  (You can watch the Entire Cosmos Episode on YouTube)
  
  
• Tycho and Kepler
  
  
• Heavenly Intrique by Joshua and Anne-Lee Guilder
  
  
• An historical timeline
  
  

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