If the geometry of space is spherical,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

If the geometry of space is spherical, it means that the universe has positive curvature. According to current observations, the universe appears to be flat, but if it were truly spherical, it would have enough matter to eventually stop the expansion and start to collapse due to gravitational attraction. This collapse would continue until all matter in the universe is concentrated into a singularity known as the Big Crunch. Therefore, the correct choice is D.

If the Geometry of Space Is Spherical,what Is the Future