A stellar system is a group of stars that are gravitationally bound and orbit a common center of mass. These systems can range in size from binary star systems with two stars orbiting each other, to large clusters containing thousands of stars. Stellar systems can also contain planets, asteroids, and other celestial bodies. Studying stellar systems can provide valuable insights into the formation and evolution of stars, as well as the dynamics of galaxies and the universe as a whole. This field of research often involves observational astronomy, theoretical modeling, and computer simulations.