An Empire-controlled star system, including the star, the planets, and the non-planetoid bodies contained therein. Imperia Triplica is comprised of three distinct star systems that are connected by posterns (wormholes) that allow quick intersystem travel between these systems. Europa was the first system settled by the ancient pre-Imperian settlers after they came through the now-vanished Lost Postern at the edge of Europa's boundaries. Europa contains the Imperia's highest concentration of citizens and Legions.
The Europa Star is orbited by seven planets, two of which have their own settled orbiting satellites. A single postern is located near the asteroid belt between the fourth and fifth planets.