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Curvature Of Space.

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Posted by Alexander on September 4, 2001 23:39:50 UTC

Curvature of space depends not only on gravitation (amount of matter) but also on motion of this matter too - keep in mind that acceleration has exactly the same effect on all physical phenomena as gravitation.

So, curvature of universe depends on which turm dominates - motion with acceleration or amount of matter. (For known value of Hubble constant this corresponds to some critical density of all matter in universe, below which curvature is negative and above - positive). Turns out that they (motion and gravity) exactly compensate each other in our universe (so, it seems to be another natural law yet to be explained by some undelying symmetry), thus yeilding in zero space curvature.

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