The Exhibit Museum has a planetarium on the fourth floor.

The Exhibit Museum Planetarium was installed in 1958. The Planetarium seats 36 people on concentric benches. The dome is one of the few remaining hand-sewn, painted canvas domes in the United States. The current planetarium instrument, a Spitz A4 machine, was installed in 1990, the third planetarium instrument to be used under this dome.

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