Stellar dynamics is a branch of astrophysics that studies the motions and interactions of stars within galaxies. This field focuses on understanding how stars move, interact, and form various structures within galaxies, including star clusters, spiral arms, and galactic disks. Stellar dynamics investigates the gravitational effects of stars on each other, as well as the influence of other factors such as dark matter and gas clouds. By studying the dynamics of stars, researchers can gain insights into the formation, evolution, and properties of galaxies.