The Pacific Planetarium Association was established in 1968 and began the process for incorporation as a non-profit in 1989. The Pacific Planetarium Association notification of approved non-profit status was received in August 24,1995. The geographical area served by the PPA includes the states of Alaska, Arizona, California, Hawaii, Idaho, Oregon, Nevada and Washington.
The current PPA newsletter/journal is called the Great Western Observer (GWO) and is a combined effort of four organizations: PPA, RMPA, GLPA and SWAP. Issues of the GWO may be accessed by clicking the GWO link in the title bar above.