Galaxy (disambiguation)

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.

The Imperium has authority over two galaxies:
 * A larger galaxy, simply referred to as "The Galaxy"
 * A much smaller galaxy located between the 4th and 5th Grand Divisions, referred to as "The Companion"

The Imperium can only travel between these two galaxies until large advances in intergalactic travel are made.