Ralph Teetor Planetarium, Joseph Moore Museum | Earlham College Skip to Content

Ralph Teetor Planetarium

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The Ralph Teetor Planetarium at the Joseph Moore Museum is open for public shows each day the museum is open. Groups and tours can also request planetraium showings in advance.

The planetarium provides the campus and community with a place to explore the universe. With its state of the art digital projector, visitors can learn about the constellations and the mythology behind them, they can zoom in for a close-up look at the planets and their moons as well as other galaxies and nebulae. Visitors can also view fun and educational full-dome movies. See the events page for more information on our upcoming movies! 

The planetarium opened in 1978, thanks to a donation from local businessman and Earlham College board member Ralph Teetor. Mr. Teetor was president of Perfect Circle Corporation in Hagerstown, Indiana. Though Perfect Circle's piston rings were world famous in the automotive community, Ralph would come to be most commonly known as the inventor of cruise control.

At the dedication of the planetarium on February 10, 1978, Earlham President Landrum Bolling said, "Ralph Teetor has always had the sense of aspiring to the stars, so the planetarium is an appropriate symbol of the spirit of the man who made it possible."

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