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A Primary is a celestial body that lies at the exact centre of a crystal sphere. In a standard system, all the planets and other celestial bodies revolve , or are otherwise arranged, around the system primary. Most systems are solar-centric, in that the primary is a large fire body, usually known as the Sun. However, there are unusual systems where the system primary is some other type of celestial body, including earth, water and air bodies. There are even documented spheres where the primary is a black hole or there is no primary at all.[1][2][3]

See also[]

List of primaries

References[]

  1. Jeff Grubb, Concordance of Arcane Space, 1989, (TSR Inc.), Universe Building section, chapter 5: Celestial Mechanics, page 74
  2. Nigel Findley, SJR4 Practical Planetology, 1991, (TSR Inc.), Introduction, chapter 6: Unusual or "Non-Standard" Worlds, page 40
  3. Jeff Grubb, Lorebook of the Void, 1989, (TSR Inc.), Types of Worlds: Part 2: Fire Worlds sidebar, page 30
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