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decrementsf t1_jcncnlk wrote

Space is round. It eventually travels around and comes back from the other side.

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Anonymous-USA t1_jcni8or wrote

Assuming that’s true, a photon could never circumnavigate the universe because the event horizon for that random photon is expanding faster than light speed. It can’t ever catch up. Any random photon anywhere in the universe at this moment has a 46B light year event horizon in all directions. And the universe itself (regardless of its geometry) is larger than the event horizon anyway.

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