Greyspace

Greyspace is the common name given to the geosystem of Oerth.

The major celestial bodies of Greyspace, from the center out, include:

• Oerth: Terrestrial planet and home to the Greyhawk campaign setting.
• Kule: Tidally-locked terrestrial body. Covered with the ruins of a humanoid civilization, but lacking any air whatsoever. A magical cataclysm is suspected to have caused the depopulation. Also known as Celene, one of Oerth's "moons."
• Raenei: Terrestrial planet, covered with earthlike features, including animals and monsters, but no sentient life. Also known as Luna, one of Oerth's "moons."
• Liga, the Sun: Star. Has many small lakes of elemental water to keep it from burning too hot. Larger than Oerth, but orbits it anyway.
• The Grinder: Spherical asteroid belt.
• Edill: Gas giant, populated primarily by dragons.
• Gnibile: Dark-red gas giant, with blobs of lava and shards of ice in the interior. Contains a gate to the Negative Material Plane. Populated primarily by undead.
• Conatha: Elliptical water world with two solid cores that orbit around each other. Populated by many piscine creatures, including merfolk and sahuagin.
• Ginsel: Crescent-shaped world that resembles a sphere with a giant bite taken out of it. Has an atmosphere on the inside of the crescent. Basic civilized fantasy world.
• Borka: Spherical asteroid cluster with a common atmosphere. Formerly a planet inhabited by orcs, goblins and other humanoids, it was devastated by the magic of the elves.
• Greela: Another spherical asteroid cluster with a common atmosphere, although many of the asteroids bear huge forests. Home to elves.
• The Spectre: A flat, circular disc of rock that appears to vanish and re-appear as it is seen edgewise, then rotates to show its full face. Also called The Wink. Has an atmosphere and water, but no life.

Other possible features of Greyspace

• Pharagos: This planet, original home of the Forerunners of the Githyanki and Githzerai, is sometimes stated to be part of the same Material Plane as Oerth.

• The Rock of Bral, a vast city-state located on a huge asteroid, is (optionally) located in The Grinder.

Bibliography

• Grubb, Jeff. Spelljammer: AD&D Adventures in Space. Lake Geneva, WI: TSR, 1989.

• Findley, Nigel. Greyspace. Lake Geneva, WI: TSR, 1992.