3 ms·
Is there an experiment which leads us to believe that the universe wraps around? I’d be very interested in any details supporting this idea.
by sillysaurusx 3y ago
Is there an experiment which leads us to believe that the universe wraps around? I’d be very interested in any details supporting this idea.
- scotchmi_st 3y agoI mean, there’s plenty of evidence for the Big Bang, and if that’s the case then the most likely shape that falls out of the maths is a hypersphere, like inflating a balloon as others have said.
- mr_mitm 3y agoNo, the big bang model allows for three topologies: flat, spherical or hyperbolical. A picture like this is in every cosmology textbook: https://upload.wikimedia.org/wikipedia/commons/9/98/End_of_universe.jpg https://upload.wikimedia.org/wikipedia/commons/9/98/End_of_u... Which one it is depends on the density. There is a critical density at which the universe is flat, and our current best measurements basically allow for all three possibilities. It's just hard to say if something is flat or actually spherical but really, really huge.
- ben_w 3y agoIf there were certain patterns in two different (opposite?) parts of the CMB, that would suggest it wraps. None have been found, so if it does wrap it's bigger than that.