In the far future, the universe will be mostly invisible
MAY 7, 2020 BY PAUL M. SUTTER
If you look out on the sky on a nice clear dark night, you’ll see thousands of intense points of light. Those stars are incredibly far away, but bright enough to be seen with the naked eye from that great distance – a considerable feat. But what you don’t see are all the small stars, the red dwarfs, too small and dim to be seen at those same distances.
The stars you see on the night sky are some of the biggest and brightest in our galactic neighborhood, the furthest one no more than a few thousand light-years away. But in that same volume there are far more than a few thousand stars.
There are up to a million. And they’re all invisible to the naked eye.
Even the closest star to the sun, Proxima Centauri, is so small and feeble that it can’t be seen without a telescope.
More:
https://www.universetoday.com/145940/in-the-far-future-the-universe-will-be-mostly-invisible/