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.
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I want to add one thing. With telescopes, we can actually identify new stars that are being born. It’s just not happening often and close enough to see it with the naked eye.
Light intensity is inversely proportional to distance-squared; a candle viewed from 100 feet away is a quarter as bright as the same candle 50 feet away.
The observable universe is many many many doublings-of-distance farther away than the bright stars we see at night, and so the light intensity we could potentially detect from those “new to us” stars gets quartered many many many times over and is simply too miniscule to detect with our naked eyes (there is simply too much noise for such a small small signal).
Because of the way light travels.
Anything that’s outside of the observable universe we will never see.
Expansion of the universe doesn’t mean we’re seeing more and more it means that the stuff that we can see is spreading out and some things are moving out of our visual range.
Any star that doesn’t form inside of the observable universe we will never see
Not sure how much of a factor this is, but because of the expansion of space, as galaxies get farther away, their light shifts to infrared, so by the time it hits us, it’s optically invisible. Also, a few galaxies every year get too far away to ever be visible, so maybe that offsets new light arriving?
Tbh you already kinda have the answer. So there are a lot of theorys about what may happen to our universe with time but the only solid and observable one is the great expansion. Where dark matter is filling the empty space between solar systems, galaxys and galaxy clusters pushing everyinh away as it spreads rapidly through the universe. We usually measure the distant of light from stars and planets by the colour they give off when scanned and documented. Pretty much every star in the sky now us inferred detected which means starts and planets we used to see reflecting light in the sky are so far away now soon we won’t even be able to detect them. Plus light pollution with a growing population doesn’t help aha. There’s a island in hawaii where you can still see directly into the heart of the milky way. 0 light pollution
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