The answer, I am told, is 'No'. But I do not understand why. Assume: (1) The Universe is spatially flat. It will one day stop expanding. (2) There is no weird dark energy. These are, I think, plausible assumptions. Then: What evidence is there to weigh against the conclusion that there is an edge to the Universe (and therefore a unique center)? It is certainly compatible with the observed expansion, no? To use a rubber sheet example: Imagine the Universe is a standard 2D sheet of computer paper, but made of rubber. Stick coins to it to represent galaxies. Then stretch it apart to represent the expansion--fast at first, but slowing asymptotically to zero. Then we have (1) all galaxies receding from each other, (2) a unique center, but not one that would be easily (or perhaps even possibly) evident to the galaxies' inhabitants. Thanks in advance.