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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?
« on: 23/03/2024 00:29:16 »Radiation from a different Universe could have travelled thru this Soapless space & entered Ours.If it could do that, it all would be one universe, by any definition.
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Donno if Another universe which was say twice or four times as dense as Ours, could ever Collapse in on itself n create a Huge blackhole within which We could have had something similar to our own Universe.A sufficiently dense universe could collapse into a big Crunch, which is kind of an un-big-bang and does not produce a black hole at all.
A black hole is caused by putting sufficient mass into a small enough region of space. A cruch is when all of space unexpands back into an arbitrarily small scale factor.
A black hole occurs at a location in space, and its opposite is a white hole, something which nothing can enter.
A crunch occurs literally everywhere, just like the big bang occurred everywhere.
Of course this is not how Bogie is using the term 'big crunch', but it is how the rest of the cosmology community uses the word.
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