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the universe is round !

hado117 said:
hitewolf, I don't mean to be rude, but please don't spread misinformation when you are not knowledgeable on a topic. Your responses in this thread have been cryptic, vague, and worst of all, completely incorrect. I think bapowell's nice concise answer is basically the end of the geometric discussion. However, there is an interesting point here that I'd like to make, which is that the curvature of the universe (positive, negative, or zero) is a separate question from the topology of our universe. For example, since we know the universe is flat (curvature is zero), the easiest solution to have is the simple plane. But there are other solutions, for example, the universe could be shaped like a torus! There are other, more exotic global topologies of the universe, and it's interesting to think about but often difficult to experimentally verify (since one can always make the radius of the doughnut, for example, very large such that there is no hope to observe its global structure on the timescales available to us).

Reference https://www.physicsforums.com/threads/is-the-universe-round-or-flat.585820/
Click to expand...
Reference https://www.physicsforums.com/threads/is-the-universe-round-or-flat.585820/
Is the universe round or flat?
"hi, I am a bit confused on what the current model of the universe is. some are saying it is round, while others are saying it is flat. which is true? If the universe is flat, then is it that only some part of it is flat or the whole universe is flat? how can we prove it theoratically and mathematically?"

Well of course the universe is round, Sir Willy Hado!

If it were flat; the solar winds would blow us off the edge, duhhh!
 
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