What is the meaning of a "closed" universe?
A)The universe is already collapsing back into another cycle.
B)The universe will someday stop expanding and begin collapsing inward.
C)The universe will slow down and stop expanding in an infinite amount of time.
D)The universe is in a steady state, with constant replacement of matter and energy.
E)The universe will expand forever.

Question

Quizplus · Accepted Answer

A closed universe refers to a universe that is finite and bound by gravity. In this scenario, the universe will eventually stop expanding due to the gravitational pull between galaxies and will begin collapsing inward. This is in contrast to an open universe where the expansion continues indefinitely, or a flat universe where the expansion rate slows but never stops. A closed universe refers to a cosmological model in which the universe is finite and will eventually stop expanding and collapse inward. This is in contrast to an open universe, which would expand forever, or a flat universe, which would continue to expand at a decreasing rate.

What Is the Meaning of a "Closed" Universe