Astronomy is the study of the sun, moon, stars, planets and other objects in outer space. Astronomers use telescopes and other tools to get a better idea of what's out there and how it works. With telescopes, astronomers can look at things like how stars and planets move, how they interact with each other, and how they formed. Astronomers also use things like computers to help them figure out the size, age, and composition of different objects in space. By studying astronomy, we can learn more about our universe and all the things in it.