Proving that the Earth Revolves

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Proving that the Earth Revolves

• Nearby stars exhibit stellar parallax
• Nearby stars are less than 100 PC away
• Only way to get parallax is if Earth has a
  baseline (It does and it is equal to 2 AU)
• Ergo, Earth must revolve about the Sun

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Alternate Proof of Revolution

• Roemers experiment about the speed of light

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Galileos Contributions

• Jupiters moons
• Venus phases

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