Based on counting the number of galaxies in a small patch of the sky and multiplying by the number of such patches needed to cover the entire sky, the total number of galaxies in the observable universe is estimated to be approximately
A)100 billion.
B)10 billion.
C)100 million.
D)1 trillion.
E)1 billion.

Question

Quizplus · Accepted Answer

The estimated number of galaxies in the observable universe is approximately 100 billion, based on observations and calculations from astronomical surveys.

Based on Counting the Number of Galaxies in a Small