 Petersen's interest in creating music for planetariums was sparked in 1975 when he observed the construction of the planetarium at the University of Colorado.After sharing some of his Moog synthesizer recordings with the planetarium's designer, Petersen was invited to create the music for the first show at the new facility, and was the composer-in-residence there from 1975 to 1978.All released by Loch Ness Productions