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June 25th, 2012, 8:17 am
June 26th, 2012, 3:37 am
Prismatic wrote:Andlan wrote: Cosmological physics turns out paradoxes by the dozen. If the universe is expanding, what is it expanding into? What caused the big bang?
Intuition is developed out of everyday events and that makes it hard to imagine an expanding universe that is simply expanding in the sense of all its constituents getting farther apart without at the same time imagining surrounding space into which it expands. However any surrounding space would be part of the universe. The answer to your question is that it is not expanding into anything. It's just expanding. Similarly with the question what caused the big bang. There does not have to be a cause at all, it is just the condition of a singularity at the beginning of time.