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.