What is the meaning of a "closed" universe?
A)The universe will expand forever.
B)The universe will someday stop expanding and start to collapse.
C)The universe will stop expanding in an infinite amount of time.
D)The universe is in a steady state.
E)The universe will disappear into a white hole in time.

Question

Quizplus · Accepted Answer

A "closed" universe refers to a universe that has enough matter to cause the expansion to eventually halt, leading to a collapse known as the "Big Crunch." This is different from an "open" universe, which will continue to expand infinitely, and a "flat" universe, which has just enough matter to slow the expansion to a halt, but not enough to cause a collapse. Option B states that the universe will stop expanding and start to collapse, which is consistent with a closed universe. A "closed" universe refers to a universe with enough mass that the gravitational pull will eventually stop the expansion and cause a collapse or a "Big Crunch."

What Is the Meaning of a "Closed" Universe