I think Penny was pointing out that it is Occam's Razor that prefers the spinning earth to the Sun going around the earth. It is General relativity (with Mach's principle) that says each is equally good, or at least equivalent.
blackjack
<a href="http://c.casalemedia.com/c?s=51816&f=3&id=0" target="_blank"><img src="http://as.casalemedia.com/s?s=51816&u=http://perplexus.info&f=3&id=0&if=0" width="120" height="600" border="0"></a>
flooble's webmaster puzzle
re(2): The official solution is entirely mistaken
