Suppose that you have two objects at opposing 'ends' of the Universe (or, if the Universe 'bends' in on itself, two objects that are a very, very, long linear distance apart). Now, since the Universe is meant to be expanding, it seems to me that two things so far apart would be likely to move away from each other at a very great speed indeed. Given the size of the Universe, might not this speed be greater than the speed of light?
1. The speed of light sets a limit on the expansion, and the expansion is in fact tiny.
2. Something happens to time at such great distances.
3. I don't know, something else.
Go easy on me — I often read about this stuff, but I never really understand it."