Quote Originally Posted by chowchig View Post
I thought the universe was still expanding.
The universe is still expanding but at one point it is theorised, that the Universe will retract. So you could make the assumption the Black hole at the center of the universe (which is impossible to determine techniquely because the universe is still expanding), is not strong enough.

There is also the theory that the universe will continue to expand and dark matter will be all we can see in the night sky as the stars will be so far away.