The Sky is filled with numerous sectors defined by either their contents or certain phenomena. Be it the corpse of a god or a realm of ghosts and spirits , there are many places to explore. However even apart from the local phenomena, the skies around them is labelled as sectors based on their celestial contents. These regions are known as the of a region, whereas the actual landmark or phenomenon is reffered to as the core. For instance a moon close to but outside of the Borean Hollows would be described as being in the Borean Purlious. The Purlious of a region is generally far larger than the core and contains more individual locations.