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
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).
Latest Answers