The Galaxy

The Galaxy is the large-scale gravitationally-bound aggregate of stars, gas, and dust in which all known civilization exists. The galaxy has several thousand different names according to the member-states of the Imperium, and while the Imperium has never adopted a single "official name," it is often referred to by the title Domus Imperii, meaning simply "Home of the Imperium." At the center of the Galaxy is a supermassive black hole known as the Grave of the Emperors.