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Thread: Einstein's Universe

  1. #1 Einstein's Universe 
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    What is the reason to that the theory of relativity claims that there are no center of the universe ?


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    not ADM!N grmpysmrf's Avatar
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    Quote Originally Posted by Bjarne View Post
    What is the reason to that the theory of relativity claims that there are no center of the universe ?
    Wouldn't it be because the Universe is constantly expanding and if you have an ever growing piece of material the center constantly changes... well, I guess it does assuming it doesn't expand at the same rate as the rest of the "edges"


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    Forum Professor Daecon's Avatar
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    Imagine the surface of a sphere, like a balloon.

    Where is the center of that surface?
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    Brassica oleracea Strange's Avatar
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    Because GR models sapce-time as a 4D manifold where spae is either infinite, or is finite but with no boundary (the balloon surface is a 2D analogy for this). No boundary means no centre.

    I think it has to have no boundary because a manifold has to be continuous (differentiable) everywhere.
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    ei incumbit probatio qui dicit, non qui negat
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