The team found that a multiply-connected universe about three... - Deepstash
Introduction to Web 3.0

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The team found that a multiply-connected universe about three to four times larger than our observable bubble best matched the CMB data. While this result technically means that you could travel in one direction and end up back where you started, you wouldn't be able to actually accomplish that in reality. We live in an expanding universe , and at large scales the universe is expanding at a rate that is faster than the speed of light, so you could never catch up and complete the loop.

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Look to the light

While a perfectly flat universe would extend out to infinity , a flat universe with a multiply-connected topology would have finite size. If we could somehow determine whether...

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Imagine a universe where you could point a spaceship in one direction and eventually return to where you started. If our universe were a finite donut, then such movements would be possible and physicists could potentially measure its size.

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