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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We can already see the stars that are close enough to see with our naked eyes. Their light got here billions of years ago. The ones whose light is just now reaching us are much, much too far away to see with anything less than the very best telescopes. It’s a big part of why we keep making better telescopes, and why we’re putting them into orbit now, to get a better look without air in the way.
On a clear night, go outside and look up at the sky. Find a patch of darkness, with no stars that you can see, and hold your hand out so your little finger covers it. The area covered by your little fingernail contains *billions* of galaxies that are just too far away for you to see them. If you had a really, really good telescope, that totally black spot would look like [this](https://www.nasa.gov/content/discoveries-hubbles-deep-fields). Those aren’t stars, they’re entire galaxies of stars.
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