Based on inventoried matter in the universe,including dark matter known to exist in galaxies and clusters,the actual density of the universe is what fraction of the critical density?
A)1 percent
B)10 percent
C)26 percent
D)74 percent
E)100 percent

Question

Quizplus · Accepted Answer

According to current measurements, the actual density of the universe (including dark matter) is approximately 26% of the critical density. This means that the universe is close to the critical density, but slightly lower, which suggests that it will continue to expand indefinitely. Options A, B, D and E are incorrect because they do not reflect the current estimate of the universe's density relative to the critical density.

Based on Inventoried Matter in the Universe,including Dark Matter Known