If the density of the universe is less than a critical value, then
A)it might eventually stop expanding.
B)it might continue expanding forever.
C)it could expand to a fixed size and remain.
D)there's probably less dark matter than luminous.

Question

Quizplus · Accepted Answer

If the density of the universe is less than the critical value, the expansion will continue forever. This is known as an open universe.

If the Density of the Universe Is Less Than a Critical