Play. Comment. Enjoy.
http://www.stumbleupon.com/su/2jRGYC/dd.dynamicdiagrams.com/wp-content/uploads/2011/01/orrery_2006.swf/
Note the difference between Copernican and Tychonian worldview. In Tycho's view, planets orbited around the Sun, which in turn went around the Earth. He was "splitting the difference" between a Ptolemaic view and a Copernican one.
http://www.solarsystemscope.com/
http://www.essex1.com/people/speer/model.html
http://rense.com/general72/size.htm
The epicycle issue:
http://astro.unl.edu/naap/ssm/animations/ptolemaic.swf
More about this to come. This is just a sneak preview.
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