I posted this in reply:Kris Thomas on Facebook wrote:You're a Spelljammer guy, so maybe you'll be able to help, in Ravenloft (stay with me I'll get there) Forged of Darkness it gives some details of the lock of the door to Azalin's Black Vault it says that the combination lock is a representation of the planets of Azalins home realm, which is Greyhawk, I have no idea about Greyspace but I've got a vague idea that it's not quite standard, any ideas?
I think that solved Kris's question, but it leaves me wondering why the door to Azalin's Black Vault is some sort of diagram of Greyspace. If he comes from Oerth, why would he know the arrangement of the planets in his crystal sphere? Was he a spacefarer before he got sucked into Ravenloft, or was he just an astronomer?David Shepherd on Facebook wrote:It might be worth starting a thread over at the Ravenloft forum at The Piazza for additional input, but the basic structure of Greyspace is:
* Oerth is in the centre of the crystal sphere (i.e. the sun, moon and other planets orbit Oerth),
* Oerth, the Sun, and Oerth's two moons are orbited by a sphere of asteroids called The Grinder (this might be represented by a circle on your door) and
* There are seven planets outside of The Grinder.
Crystal spheres also have other features (called Additional Astronomicals). Some of these might be featured on the door, but it is probably less likely they would be there.
I have a "master thread" for Greyspace in the Spelljammer forum at The Piazza and that has a full list of the celestial bodies, local organisations and some useful links:
Or is there some other reason why the door might represent the worlds of Greyspace?