dingo1018 t1_iuct0r0 wrote on October 30, 2022 at 10:37 AM

Did you consider how much of the sky that image covers? Hold a grain of rice out at arms length, that much sky and that's generous, every single direction is the same right out to our cosmic horizon, and that is simply an arbitrary distance due to the speed of light and the expansion of the space in between. There is every reason to assume that it just continues forever! Much of the universe, in fact likely most of the universe will forever be invisible from us because the light will never arrive here! The space between the galaxies is expanding, once you get above a certain distance the cumulative expansion exceeds the speed of light! There is so much stuff, so many mysteries.

EDFLsnape OP t1_iudsg3i wrote on October 30, 2022 at 3:54 PM

Well that kind of makes me think, as we are looking up at the sky we are technically looking at infinite space. We can't see it but there is still no end.

dingo1018 t1_iudtxr2 wrote on October 30, 2022 at 4:04 PM

Or the other main idea also means it has no end but is finite, basically the 3 dimensions of space could curve around, like Pac Man running off the right side of the screen and appearing in the left. Only the curvature is so slight that from our scale we cannot detect it, the cosmic horizon being such an insignificant fraction of the whole we cannot picture the universe being round!