The Milky Way galaxy is a part of outer space made up of Earth, its solar system, and all the stars you can see at night. There are over 100 billion star in the Milky Way. The Milky Way is shaped much like a CD. It has a center that the outer part goes around. The Milky Way is always spinning slowly through space. It is so large that it would take 200 million years for the galaxy to turn one complete time.
Many stars in the Milky Way are in clusters. Some star clusters contain up to one million stars!