<font color="yellow">..sorry for what will probably be a very stupid question,</font><br /><br />There is no such thing as a stupid question. Seeking knowledge is intelligent behavior and is immediately recognized as such by those who's commentary is worth reading.<br /><br />... and, if you came for a stupid answer, well, never fear. If I can't come up with one, then there isn't one to be had. The good answers have all been given. So, stupid answer #1 on the way!<br /><br />Stupid Answer#1: The Sagnac Effect is related , in both theory and scope, to the Coriolis Effect observed by the cavitation waves of two plastic whiffle balls rotating within a medium of clean soapy water. This was discovered in 2003 by a_lost_packet_ during the famous "Laundry Machine Incident." Sadly, it wasn't until much later, in 2004, that Science recognized this important achievement in the art of depleting one's wallet on repair parts at the expense of progressing the cause of Science.<br /><br />To be fair, here is an "answer" whether it is good or not:<br /><br />The main problem, in my understanding of various propositions of Sagnac effect and Geocentrism, is the frame of referrence used. Also, comparing of frames of referrence using entirely different systems of measurement and discovery is not equitable. It's apples and oranges. So, the arguement for geocentrism resting on Sagnac Effect is based on ideas that would yield the same result, given a different system of measurement, regardless of what was proposed. It's like proving you have an orange in your hand by pointing at an apple and arguing that "you" call it an "orange" in the country you come from. At least, from the very limited info I gleaned on the subject. But, don't quote me, do some "googling" to check it out. Successful hits were "Sagnac Geocentric" "Sagnac Geocentric Debunk" and "Sagnac Effect." Not alot of arguing going on there by the way.<br /><br />Ah, here's something I can answer:<br /><br /> <div class="Discussion_UserSignature"> <font size="1">I put on my robe and wizard hat...</font> </div>