Human: What are the different types of astronomy? Assistant: 
The different types of astronomy include observational astronomy, theoretical astronomy, experimental astronomy, and astrophotography. Observational astronomy involves studying objects in space by using telescopes to observe them. Theoretical astronomy is based on mathematical models and simulations that attempt to explain astronomical phenomena. Experimental astronomy uses telescopes and other instruments to test theories about the universe. Astrophotography is the art of taking pictures of celestial bodies.