I run an open Galaxy game where the players can go wherever they want. However this is something of a problem since my players are "creative" and quite often do something totally out of left field. Does anyone know of a compilation of planetary knowledge that one could flip to that planet and get a bestiary, population, description, political situation, brief history, etc? It's a huge undertaking but in point form,it would be an invaluable assethe to Gm'so.
Star wars encyclopedia
Umm...
wookieepedia?
http://starwars.wikia.com/wiki/Main_Page
This, although it's not EVERY planet or moon
http://swgalaxymap.com/ has a list of all the plotted planets and direct links to the sector and system information in Wookieepedia (as referenced above).
Don’t forget the Star Wars Atlas.