Disk dynamics is a research area that focuses on the study of the movement and interactions of matter within a rotating disk-shaped system, such as a planetary disk or a galactic disk. This field encompasses a wide range of topics, including the formation and evolution of disks, the dynamics of individual particles within the disk, and the gravitational interactions between different components of the disk. Disk dynamics is important for understanding the processes that shape the structure and evolution of various astrophysical systems, such as protoplanetary disks where planets form, or galactic disks where stars are born and evolve. The study of disk dynamics can provide valuable insights into the origins and evolution of planetary systems, galaxies, and other astronomical objects.