with how light works and the constant expansion of what we term the “observable universe” why don’t we constantly see new stars appearing in the night sky as the observable part expands and stars/galaxies light reaches us for the first time?
The night sky has stayed relatively the same (accounting for changing postions over time, stella phenom, supernovas etc.) for all of humans written history.
In: 515
The stars that are far enough away for us to not have seen them by now are *so* far away that they are incredibly feint. Those stars are *far* too faint for you to see with your own eyes.
But also, the [observable universe is shrinking](https://medium.com/swlh/the-universe-is-expanding-but-its-also-shrinking-4bcb1b6c7c8f). The whole universe is expanding, of course, but because the expansion is accelerating and because the edge of the observable universe is so incredibly far away, the most distant galaxies are receding away from us faster than light. Galaxies beyond a certain point are too far away for us to *ever* see them because the space between us has already been expanding faster than light so that their light never had a chance to reach us.
As the universe has continued to expand faster and faster, more and more galaxies will cross that line so that their light can’t reach us anymore.
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