The Solar System is about 5 billion years old and completes one orbit around the center of the Milky Way in 220 million years. Therefore, we conclude that the Solar system has completed a total of about ___ orbits around the Galactic center.
A) 5
B) 10
C) 22
D) 50

Question

Quizplus · Accepted Answer

The Solar System has completed about 22 orbits around the Galactic center because 5 billion years / 220 million years = 22.72.

The Solar System Is About 5 Billion Years Old and Completes