this post was submitted on 19 Jun 2023
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Could Earth be inside a black hole? (www.livescience.com)
submitted 2 years ago by ragica@lemmy.ml to c/science@lemmy.ml
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[–] BrooklynMan@lemmy.ml 3 points 2 years ago

tl:dr: possibly, but if so, it would be the size of the entire universe and, as a result, impossible for us to determine one way to the other.

[–] i_love_FFT@lemmy.ml 3 points 2 years ago

This topic comes up from time to time. If you're interested, check this article by a cosmologist. https://www.preposterousuniverse.com/blog/2010/04/28/the-universe-is-not-a-black-hole/

[–] Gsus4@lemmy.one 1 points 2 years ago

I didn't find any ArXiv links in the page, but the main point is this: given how flat the Universe is, if it is inside a black hole, it needs to be really large in order to keep the curvature inside so flat.