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Originally Posted by d*d
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
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I did not explain it well, but the arrangement I was thinking of has each of the sheet's edges being pulled away from the center of the sheet simultaneously. Of course a 2D analogy will never explain the 3D concept perfectly.