The galaxy is full of stars and planets.

A large system of stars, gas, and dust held together by gravity.
Astronomers study the galaxy to learn more about space.
Our solar system is located in a spiral galaxy.
Many galaxies can be seen through a powerful telescope.
spiral galaxy
elliptical galaxy
galaxy cluster
star system
stellar system
cosmic system
The Milky Way is our galaxy.

A large system of stars, gas, and dust in space, held together by gravity.
Andromeda is another galaxy.
There are billions of galaxies in the universe.
Astronomers study the formation of galaxies.
spiral galaxy
elliptical galaxy
distant galaxy
star system
stellar system
cosmic system