Sector

The galaxy is subdivided into cube shaped sectors that are 10x10x10 parsecs in size.

The locations of sectors within the galaxy are expressed using the Cartesian coordinate system. An (X,Y,Z) coordinate specifies the location of a sector by its distance from the center of the galaxy, measured in sectors: positive X is east; negative X is west; positive Y is north; negative Y is south; positive Z is up; negative Z is down. For example, coordinate (312,-2,1) is 312 sectors east, then 2 sectors south, then 1 sector up from the center of the galaxy.

Sectors contain solar systems and large scale astronomical phenomena, such as nebulae.