Galactic Dynamics -

: Understanding systems where individual stellar encounters are rare enough to be ignored. This uses the Collisionless Boltzmann Equation and Jeans Equations to describe equilibrium.

: Studying processes like dynamical friction (the "drag" on massive objects moving through a sea of stars) and violent relaxation . Essential Resources Galactic Dynamics

: Explaining the origin and stability of spiral structures through density wave theory. Galactic Dynamics