The galaxy

The galaxy, as it was commonly referred to, was one of trillions of galaxies in the observable universe. The galaxy was a vast composite of over 400 billion estimated stars and over 3.2 billion habitable systems orbiting around a supermassive black hole known as the Galactic Centre, which existed at the heart of the galaxy. The four galactic arms rotated around this black hole across a diameter of around 120,000 light-years. It was home to countless sentient species and star systems.
The galaxy would serve as the setting for trade, politics, and war throughout galactic history. In historical memory, the galaxy would see the successive eras of the Galactic Republic, Galactic Empire, New Republic, among others, and was home to the Force-sensitive sects such as the Jedi Order and Sith and numerous cultural groups such as the Mandalorians.