Planetarium makers do awesome work, even building "home-domes" for exhibition - The Home Planetarium Association welcomes all those who build small planetariums for home, school, museum, or other personal use. A quarterly newsletter is produced; This includes collecting toy planetaria, operating older or small professional units, or just fondly remembering childhood trips to planetariums around the world. The stars await, always... - Home Planetarium Association
The Planetarium Projector & Space Museum gallery page is home to some truly elegant apparatus. The organization collects old and unused projectors and preserves them for historic display - beautiful devices! - Planetarium Projector & Space Museum
Related:
Planetarium projectors
In the Maker store:
Illustrated Guide to Astronomical Wonders
http://blog.makezine.com/archive/2008/03/planetarium_projector_mus.html