Question

From choices below, the best estimate of the age of the Universe is _____ old.

A. five million
B. five billion
C. fifteen billion
D. one hundred billion

Answer 1

The best estimate of the age of the Universe is fifteen billion years.

Step-by-step explanation:

The best estimate of the age of the Universe is fifteen billion years. This estimate is derived from the Hubble constant, which is a measure of the rate of expansion of the Universe. The reciprocal of the Hubble constant gives us the age of the Universe, and for a Hubble constant of 20 kilometers/second per million light-years, the age is approximately fifteen billion years.