What can be described as a system of stars gasses dust and other matter that orbits a common center of gravity?

A system of stars, gases, dust, and other matter that orbits a common center of gravity is known as a galaxy. Galaxies can vary in size and structure, containing billions to trillions of stars and vast amounts of interstellar material. They are held together by gravitational forces and can include various components such as star clusters, nebulae, and dark matter. The Milky Way is an example of a spiral galaxy that contains our solar system.