What will happen if the universe is closed?
A) The universe will expand past its maximum size, then fragment into mini-universes.
B) The universe will eventually fall back in on itself, heading toward a "Big Crunch."
C) The universe will expand forever.
D) The universe will reach a maximum size and remain there, like a balloon being blown up.

Question

Quizplus · Accepted Answer

If the universe is closed, it means that its curvature is positive and it will eventually stop expanding and eventually start contracting due to gravity. This contraction will lead to a "Big Crunch," where the universe collapses in on itself.

What Will Happen If the Universe Is Closed