The secondary division of the universe. The second number in any set of coordinates denotes the solar system in which the planet is located. When you use galaxy view you view one solar system at a time.

Each solar system consists of 15 Planets, which may or may not be colonized, and an Outer Space slot.

The look of a solar system and it`s planets repeats every 40 solar systems. E.g. Planet 2:40:8 looks like planet 2:80:8 and planet 2:80:2 looks like planet 2:120:2.