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The Observable Universe Might Be A Black Hole, Suggests A Chart Of Everything
(www.iflscience.com)
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this post was submitted on 21 Oct 2023
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There's also an event horizon where space is expanding away from us rapidly enough that we can never get that far no matter how long we travel.
Oh yeah, that's also a great point, the Hubble horizon!
It turns out there are a few different horizons in cosmology like that, they really do show up everywhere.