Associations
Great Lakes Planetarium Association [GLPA], Great Plains Planetarium Association [GPPA], International Planetarium Society [IPS], Middle Atlantic Planetarium Society [MAPS], Pacific Planetarium Association [PPA], Southeastern Planetarium Association [SEPA], Southwest Association of Planetariums [SWAP]
Europe
Astronomy Roadshow, Auriga Astronomy, Cycle the Solar System - UK, Eise Eisinga Planetarium Franeker, London Planetarium, Mizar Traveling Planetarium, Mobile School Planetarium and Astronomy Shop - UK, South Downs Planetarium Trust, Stardome Planetarium, The Steno Planetarium
Products and Services
allsky.de, Ash Enterprises International Inc., Astronomical Digital Images, Cosmic Sky Productions, Kensington House STARLAB, Loch Ness Productions, Planetarium Prague, R.S.Automation Cosmos, Spitz Planetaria, Domes and Immersive Technologies
Planetarium Net
The online meeting place for planetarium professionals. Includes articles, news, educational resources, and more for astronomy educators.
Planetarium Software
Links to many different kinds of software for several platforms.
Planetarium Web Sites
A directory of worldwide planetariums.