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A '''Sector''' is a measurement of space used by the [[Imperium]]. They are divisions of a [[Segmentum]]. The size of a sector varies according to local demands and stellar density, but are usually equivalent to a cube with sides 200 light years long. A naval [[Battlefleet]] of warships defend each sector.{{Fn|1}} The Sectors themselves are overseen by [[Sector Lord]]s.{{Fn|2}}
Sectors are in turn divided into '''Subsectors''' [[Subsector]]s (or '''Sub-Sectors'''), which range from ten to twenty light years in diameter. Subsectors, rather than being general blocks of space like sectors, are instead centered centred on densely populated star clusters, important worlds, or meeting points of [[warp]] trade routes.{{Fn|1}}
The areas between sectors and subsectors are vast, in fact making up more of the [[Galaxy]] than the Imperium controls. They are often unexplored, uninhabited, alien empires, or inaccessible by the warp. These zones are known by various names including [[Wilderness Space]] or wilderness zones,{{Fn|1}} inter sectors, forbidden zones, empty space, or frontier space.
==Related articlesSee also==
*[[List of sectors]]
==Sources==
*{{Endn|1}}: [[Battlefleet Gothic Rulebook]], pg. 86
*{{Endn|2}}: [[Dark Heresy: Blood of Martyrs]] , pg.26
===Uncited===
[[Category:Galactic Sectors| ]]
[[Category:The Galaxy]]
[[de:Sektor]]
[[fr:Secteur]]