14 - Finding the phases of venus shows that venus is going...

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He says that the motion for the whole planetary system comes from the spinning sun. It even makes the earth spin on it's axis. When he is discussing the joshua story of sun stop spinning, it would mean sun stop spinning on its axis. He finds that Venus shows phases. If You look at venus you will see a full venus and then it has phases. Kepler's explanation shows that venus is going around the sun. only see part of venus illuminated by the sun. What doe sthat mean?
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Unformatted text preview: Finding the phases of venus shows that venus is going around the sun. In the ptolemaic system you would never get a full venus which galileo sees. This doesn't necessarily prove copernicanism but it eliminates ptolemaic theory. Doesn't prove earth goes around the sun. Galileo doesn't prove copernican case, but moves in that direction....
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This note was uploaded on 12/03/2011 for the course HISTORY 322D taught by Professor Hunt during the Fall '11 term at University of Texas at Austin.

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