Type B • Earth Body Kule (also known as Celene) is the smaller of [[Greyspace|Greyhawk]]'s two moons. Technically, everything that spins about [[Oerth]] is a "moon," but only Kule and its sister planet, [[Raenei]], are close enough for an observer to discern planetary features. As they lie within the orbit of the [[Greyspace]] sun, [[Liga]], they are the only planets to cause eclipses and for these reasons are referred to as the only moons of Oerth. Kule is a voidworld, lacking even the vestige of an atmosphere on its surface. Advanced ruins, towers, and minarets indicate that there was once civilization on the surface long ago of some bipedal type, but it has vanished with the air. Some magical agent, as opposed to the work of gods, is presumed. Kule is tidally locked, showing only one face to Oerth. The side facing Oerth is littered with debris of ruined cities, while the opposite face has mostly intact towers and citadels exposed to the open space. The entire surface of the planet is scored by extensive undergound passages and cities. These are occupied by hu-mans and other savage races, but as on Oerth, the dominant underground races are mind flayers, drow, kuo-toa , and similar evil creatures. There is some speculation that dimensional links exist between the ruins of Kule and the Oerthian underdark. Kule is rarely visited by star voyag ers, except for those adventurers who are looking to loot the wonders of the past from this place .