> Isn't that the whole thing about the fact that when we look at any patch of sky, we don't see it just lit up with stars filling all of it ? Like if it was inf

> Isn't that the whole thing about the fact that when we look at any patch of sky, we don't see it just lit up with stars filling all of it ? Like if it was infinite and we had infinite stars randomly distributed, there's be a patch of sky where we'd have an infinite amount of stars in front of eachother. That would require stars to be outputting infinite energy in the form of light we can see. They are not, so we do get enough of their light to see them with the naked eye. The farther away they are, the less and less photons make it to our eyes. So, yes, you can look up in the night sky and see infinite galaxies, but your eyes are not sensitive enough to pick out the one or two photons every few seconds and tell you there is something there. However, we have tools to do that for us: https://www.space.com/17755-farthest-universe-view-hubble-space-telescope.html https://www.space.com/17755-farthest-universe-view-hubble-sp...