Planetary science is a broad subject that deals with the study of planets, moons, asteroids, and other celestial bodies in our solar system. This field of study is an interdisciplinary one that combines knowledge from geology, physics, chemistry, and astronomy. Some synonyms for the term "planetary science" include "astrogeology," which specifically focuses on the geology of celestial objects; "planetology," which deals with the study of planets and their formation; and "exoplanetology," which pertains to the study of planets outside our solar system. Other terms that are closely related to planetary science include "astrobiology," "astrophysics," and "cosmology".