this post was submitted on 08 Sep 2023
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Although "commonly accepted" may be pushing it, i can't imagine a finite universe(, i.e., 'with a positive curvature'/spherical), with the old question : what happens at the edge if i push it with a stick ?
(I.i.r.c., the answer is that the edge is expanding faster than the speed of light or sthg)
(And, kinda unrelated, fractal universes piling upon each other may make sense)
You're probably picturing the inside 3D sphere, but it would actually be the surface of a 4D sphere. Just like how Earth doesn't have an "edge", if you walk in a straight line you just end up where you started, so there's nothing to "push" at all
So Isaac Brock has been right for like 20 years? "The universe is shaped exactly like the earth. If you go straight long enough you end up where you were."
It's only one of many possibilities, we have no idea about the actual topology of the universe. It could also be infinite