Planetary physics is a branch of physics that focuses on studying the physical properties and behaviors of planets, moons, asteroids, comets, and other celestial bodies in our solar system and beyond. Researchers in this field use a combination of theoretical models, observational data, and laboratory experiments to better understand the formation, evolution, and dynamics of these objects. Some key areas of study in planetary physics include planetary geology, atmospheres, magnetospheres, and gravitational interactions. This research helps scientists gain insights into the origins of our solar system, as well as the potential habitability of other planets and moons.