What are the boundaries of univers
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The universe (observable or otherwise) has no boundary in the physical sense. This is one of the most commonly seen misunderstandings about physical cosmology. The universe is not a bubble expanding into a preexisting volume. The universe exists everywhere and and is approximately the same everywhere.
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No evidence exists to suggest that the boundary of the observable universe constitutes a boundary on the universe as a whole, nor do any of the mainstream cosmological models propose that the universe has any physical boundary
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