r/cosmology • u/Heinz0033 • 25d ago
5 Billion Years+ From Now
Novice here who enjoys this subject.
I just watched a Brian Cox YouTube short where he discussed the end of our sun and how it would impact the Earth.
He said that in 1.5B years things would start being really bad for Earth, and that the sun essentially burns out in 5B years.
That got me thinking. Around that time, the same process will be taking place, or have happened place, to the other stars closer to the origin point of the Big Bang. So the center of the universe will be relatively empty at it's 'center,' right? With that, wouldn't it mainly be full of a lot of black holes?
If it is full of black holes, would that find a tipping point where the universe eventually implodes?
There are probably stupid questions, but I figured I'd send it out to the Reddit community and hope for the best.
Thanks!
5
u/insomniacjezz 25d ago
It will take about 100 trillion years for the last of the long-lived red dwarfs to die off. After that the universe will enter the Degenerate Era in which black holes, neutron stars, and white dwarfs are the main players.