Astronomy is a branch of science that focuses on space and things in space. These things include stars, moons, planets, galaxies, and comets, to name a few. Many scientists who are interested in space will major in astronomy or take a few classes in astronomy. Different types of astronomy can be studied, and these include radio astronomy, infrared astronomy, optical astronomy, ultraviolet astronomy, gamma-ray astronomy, and x-ray astronomy.
Astronomy is a big field, and there are several subfields in it. Some of these are astrobiology, solar astronomy, and astrophysics. Astrology is not a study, but it is using space to determine things that are going to happen in the future. They make predictions about what is going to happen based on what they see in space.