Because we live in a universe with an accelerating expansion rate,the actual age of the universe is ________ the Hubble time.
A) larger than
B) smaller than
C) the same as
D) independent of

Question

Quizplus · Accepted Answer

The Hubble time is the inverse of the Hubble constant, which gives an estimate of the age of the universe based on its current expansion rate. However, since we now know that the expansion rate is accelerating, the actual age of the universe is larger than the Hubble time. This is because the acceleration means that the universe has been expanding faster and faster over time, which means that it must have taken longer to reach its current size than the Hubble time would suggest.

Because We Live in a Universe with an Accelerating Expansion