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1. Does a hole not have to be a hole in something? If the Universe is all there is, in what could it be a hole (black or otherwise)?2. If there is no space outside the Universe, where (and what) would the Schwarzschild radius be?
Assuming the universe was the shape of a ball, how large was it when the Big Bang happened. Thanks for comments. Joe L. Ogan
The Universe was not concentrated into a point at the time of the Big Bang. But the observable Universe was concentrated into a point.