So I’ve been going through the dangerous rabbit hole of wondering how everything came to be and, obviously, the leading theory is the big bang theory. Where an infinitely dense spot of matter exploded and created every single thing in existence, including the ever-expanding universe. So, if the ever-expanding universe started expanding from an infinitely dense spot that exploded, wouldn’t that spot be the “center of the universe”, since it’s the starting point of said expansion?
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You are misunderstanding nature of big bang singularity and expansion. It wasn’t infinitely small early universe, it was infinitely dense early universe.
Universe doesn’t have some hard border, best we can tell its infinitely large and always has been. But in the past everything was much closer to everything else right down to very early universe when vacuum of space wasn’t even a thing because everything was so close together, and very hot too, nuclear fusion type of environment.
Expansion of the universe is not increase of some border, because universe has no such thing. Its expansion of space between everything, uniformly, there is no center everything is expanding away from.
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