Based on current evidence,how does the actual average density of matter in the universe compare to the critical density?
A)If we include dark matter,the actual density equals the critical density.
B)The actual density,even with dark matter included,is about a third of the critical density.
C)The actual density of dark matter and luminous matter combined is no more than about 1% of the critical density.
D)The actual density of matter is many times higher than the critical density.

Question

Quizplus · Accepted Answer

Current evidence suggests that the actual density of matter in the universe, including dark matter, is only about a third of the critical density. This indicates that there is not enough matter in the universe to halt the expansion that began with the Big Bang.

Based on Current Evidence,how Does the Actual Average Density of Matter