A holographic representation of the Yost system.
A system, which can also be referred to as a star system, planetary system, or solar system, was a collection of planets and other celestial objects in orbit around a central star. It was common for stars in the galaxy to possess their own systems of planets. Important system chains created routes that served as essential hyperspace lanes for both trade and general travel, potentially spanning multiple sectors. A single system could encompass a multitude of planets, an even greater number of moons, and countless other celestial bodies.
During the crisis preceding the Clone Wars, several hundred systems, previously part of the Galactic Republic, withdrew their allegiance and established the Confederacy of Independent Systems. This secessionist movement was headed by Count Dooku of Serenno, a former Jedi Master.