A Moon is a celestial body that revolves (or orbits) around a planet, which can also be referred to as the moon's primary[1] (as opposed to the system primary which lies at the center of the crystal sphere). A moon will be no larger than one size category smaller than the planet it orbits, and a planet may have more than one moon orbiting around it.[2]
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- ↑ Jeff Grubb, Concordance of Arcane Space, 1989, (TSR Inc.), Laying out the Planets section, chapter 5: Celestial Mechanics, page 72
- ↑ Jeff Grubb, Concordance of Arcane Space, 1989, (TSR Inc.), Moon section, chapter 5: Celestial Mechanics, page 76