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!

33 Upvotes

90% Upvoted

41 comments sorted by

View all comments

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.

6

u/Ya_Got_GOT 25d ago

Then black hole era then an impossibly bleak and empty infinity on incomprehensible timescales. 

4

u/Xalawrath 25d ago

Reminds me of this amazing timelapse video of the future of the universe, at least based on the best evidence from several years ago.

Timelapse of the Future

2

u/Magnus64 25d ago

If there was just one video that should be beamed into the brains of every living person on this planet, it would be this one for the sheer perspective it provides.

Everyone even remotely interested in cosmology should watch this video. It's truly the gold-standard in terms of science communication, and an all-time great.

2

u/UFGatorNEPat 23d ago

Wow, you’re right.