(January 31, 2014 at 1:34 pm)StuW Wrote:(January 31, 2014 at 12:40 pm)Alex K Wrote: It is not true that a spatially exactly flat universe would have to be spatially infinite.There are suitable flat manifolds of finite size, e.g. the three-dimensional torus (S^1)^3
Even in a finite torus the universe would still be approximately 100 times larger than the horizon distance. regardless, it's a fecking huge!
Yes absolutely, those measurements still apply! And it could be infinite anyways...