Planetary dynamics is a field of study that focuses on the motion and behavior of celestial bodies within a solar system, including planets, moons, asteroids, and comets. Researchers in this area seek to understand the gravitational forces and interactions between these celestial bodies, as well as the effects of these interactions on their orbits, rotations, and overall movement. Key topics of study in planetary dynamics include orbital mechanics, celestial mechanics, and gravitational interactions between celestial bodies. By studying these dynamics, researchers can predict the future movements and positions of planets and other objects in the solar system, as well as gain insights into the formation and evolution of planetary systems. Overall, planetary dynamics plays a crucial role in advancing our understanding of the structure and behavior of the solar system, as well as informing our knowledge of the broader universe.