If the geometry of space is spherical and if the universe has no dark energy, what is the future of the universe?
A) The future of the universe is not related to the geometry of space.
B) The universe will expand forever, not stopping even when infinite time has elapsed.
C) The universe will hardly expand forever; if it has any more matter in it than it does, it will eventually stop expanding and start to collapse.
D) The universe will expand to a maximum size and then collapse into a Big Crunch.

Question

Quizplus · Accepted Answer

In a spherical geometry without dark energy, the gravitational attraction of all the matter in the universe will eventually overcome the expansion, leading to a maximum size before the universe begins to collapse back on itself, culminating in a Big Crunch.

If the Geometry of Space Is Spherical and If the Universe