Some people wish that we lived in a recollapsing universe that would eventually stop expanding and start contracting. For this to be the case, which of the following would have to be true (based on current understanding)?

Question

Quizplus · Accepted Answer

For the universe to eventually stop expanding and start contracting, it would require a significant amount of gravitational pull, which could be provided by a much greater amount of dark matter than currently known, assuming dark energy (which is responsible for the accelerated expansion of the universe) does not exist.

Some People Wish That We Lived in a Recollapsing Universe