A visual representation of the Yost system in holographic form.
A system, referred to by various names such as star system, planetary system, or solar system, constituted a collection of planets and other celestial objects in orbit around a central star. It was common for the majority of stars within the galaxy to possess their own planetary systems. Key star systems were often linked together to form routes, which served as essential hyperspace lanes for both commerce and travel, potentially spanning across numerous sectors. A single system had the capacity to include numerous planets, an even greater quantity of moons, and a diverse assortment of other celestial entities.
During the crisis that preceded the Clone Wars, a significant number of systems, specifically several hundred, that were originally part of the Galactic Republic, chose to break away and establish the Confederacy of Independent Systems. This secessionist movement was spearheaded by Count Dooku of Serenno, a former member of the Jedi Master order.