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Open daily 10 a.m.–5 p.m.
The Zeiss Model II Star Projector was constructed by Germany’s Zeiss. The iconic projector, nicknamed “Jake” by Buhl Planetarium staff, was the workhorse of the Buhl Planetarium from 1939 until Carnegie Science Center (now Kamin Science Center) opened in 1991, after which it was reserved for special programming. By that time, Zeiss had ceased making parts for the II models, and Buhl Planetarium staff had to custom-make replacements to keep the stars shining for visitors. It was officially retired in 1994.
The Zeiss Model II Star Projector used a star globe—a high-tech flashlight—at each end, one projecting the stars of the Northern Hemisphere and the other the stars of the Southern Hemisphere. Complex clockwork mechanisms allowed it to accurately project the stars at any point in time, from any place on the Earth. It would even correct for the planet’s precession, the slight wobble in its rotation that causes “true north” to change over time.
The Zeiss Model II Star Projector used a 1,000-watt incandescent bulb. The filament’s position and shape were critical to making sure the light projection that created the stars was accurate. Additional projection spheres were used to add other stars that were not visible due to “blind spots” on the larger star balls. The projector was known worldwide for its accuracy and advanced technologies.
