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Originally Posted by Phage
so it is possible that the universe does not wrap like a balloon at all, but rather is like a flat sheet of rubber with the edge being stretched away so quickly that someone standing on the sheet would never be able to catch or even see it.
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But using that analogy your not accounting for the fact that every point in universe is expanding and moving away at the same rate, using the sheet of rubber analogy two points both perpendicular to the stretch direction would not appear to be moving apart, you need the form of the ballon to shift the centre of the expansion off the sheet itself