Luminary

A Luminary is a system of planets concentrated in a localized region of Wildspace. While many luminaries have only one star and several planets, this is not always the case. Some may have multiple stars located in the center, others may have one star per planet. Others still, may have a planet at the center of the luminary, with a star and all other planets (if there are any) orbiting it.

Overview
The typical make-up of a luminary is the star, surrounded by several World Realms, with some of those Worlds possessing Lunar Realms. Sometimes these luminaries will also possess Shard Realms; the broken and tattered remains of what was once a World Realm.