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→Both Theories Correct?: If you do calculations in Earth-centered coordinates then you are using geocentric theory
:I agree. Maybe the proper thing to say is that modern theories suggest that there is no "center" to the universe per se. At the same time, modern physical models and mathematical tools allow us to call any point the center for purposes of convenience. That was the real problem with geocentrism: It took the observed motions of the planets and forced them into a messy spheres-within-spheres model which not only was complicated but also shed no light on the real (Kepplerian) physical principles involved. [[User:Ga ohoyt|Ga ohoyt]] 12:39, 7 June 2007 (EDT)
:I agree. Maybe the proper thing to say is that modern theories suggest that there is no "center" to the universe per se. At the same time, modern physical models and mathematical tools allow us to call any point the center for purposes of convenience. That was the real problem with geocentrism: It took the observed motions of the planets and forced them into a messy spheres-within-spheres model which not only was complicated but also shed no light on the real (Kepplerian) physical principles involved. [[User:Ga ohoyt|Ga ohoyt]] 12:39, 7 June 2007 (EDT)
: No, that is not error. If you do calculations in Earth-centered coordinates then you are using geocentric theory, whether you think of the Earth as static or not. [[User:RSchlafly|RSchlafly]] 12:49, 7 June 2007 (EDT)