The Earth rotates around its axis and orbits around the Sun. In addition to these two movements, the planet also experiences a third form of movement. 

Our planet moves in space at great speed as a part of a large star system or galaxy. 

Galaxies are full of stars. The Sun is only one of the stars in our solar system. 

During dark and bright nights, we can see our own galaxy in the form of dense star clusters. Our galaxy is known as the Milky Way. We cannot see all of it, however, because we are located inside it. The Milky Way as seen from Earth.