Consider a universe without dark energy (i.e., all the energy in the universe produces an attractive gravitational force). What will happen if the universe is closed?
A) The universe will expand past its maximum size, then fragment into miniuniverses.
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

In a closed universe without dark energy, gravity would cause all matter to eventually pull back together, leading to a collapse of the universe, known as the "Big Crunch." This scenario assumes that the gravitational forces overcome the initial expansion.

Consider a Universe Without Dark Energy (I