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When he says heliocentrism is obsolete, I doubt he's saying that the earth and other planets in the solar system don't revolve around the sun. I think he's pointing out that the entire universe is not centered at the sun. The entire solar system revolves around the center of the milky way, in the same way that the moon revolves around the earth while the earth revolves around the sun. [[User:Hermann1359|Hermann1359]] 17:19, 31 January 2008 (EST)
When he says heliocentrism is obsolete, I doubt he's saying that the earth and other planets in the solar system don't revolve around the sun. I think he's pointing out that the entire universe is not centered at the sun. The entire solar system revolves around the center of the milky way, in the same way that the moon revolves around the earth while the earth revolves around the sun. [[User:Hermann1359|Hermann1359]] 17:19, 31 January 2008 (EST)
:I have made some changes to the article in an effort to clarify. Clearly no-one holds a heliocentric view of the universe any more. Even a strict heliocentric view of the solar system does not really work because orbits are elliptical (although that might be getting to a level of detail that is beyond the scope of this article). I think that the paragraph referring to relativity is incorrect, however. Where orbits are concerned there are preferred frames of reference. More editing required I think. --[[User:GDewey|GDewey]] 17:26, 31 January 2008 (EST)