The Universe: Infinite Or With A Boundary
Whether it’s more troubling to imagine that the Universe goes on forever in every direction, or that it has an edge, beyond which there is nothing, is hard to say.
Astrophysics doesn’t provide any guidance as to which flavour of existential crisis we should be having – while we can’t say with any level of confidence whether the Universe goes on forever or not, we can say that our observable universe has an edge, in the sense that there’s a distance beyond which, whatever may or may not exist, we absolutely cannot see it.
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