- - - Spitz Space Transit Planetarium Projector - - -

This magnificent projector is one of only 11 ever made by Spitz. This projector was purchased from The Gengras Planetarium at The Children's Museum in Connecticut and is affectionately known by the name of Stella. She completed nearly 40 years of continuous service and educated over 1,000,000 people before being replaced by an all new digital planetarium system. She is capable of generating over 4,000 stars and all the visible planets. This machine is currently at the Museum and is on display. Here is a list of the 11 STPs that were built and where they originally went to: Houston, Trenton, Salt Lake City, Abrams at Michigan State, Bradenton's Bishop Planetarium, Yonkers, Denver, Hartford, Warminster, Montgomery and the last operating STP in Miami went dark in 2015.

Stella our Spitz STP Projector being Restored

Some interesting facts about the STP projector. It was the first commercial projector to have a third (yaw) axis and the very first to be computer controlled. It projects over 4,000 stars to magnitude +5.8 and all stars greater than 3.5 are projected using 260 separate lenses. It uses two 75 watt arc lamps for light sources for projection on a 40 to 65 foot dome. There are 10 analogs versus 7 as in the popular A3P. There is a separate analog for the Earth which was needed because this was the very first projector that would allow you to place the audience on the moon or other location in outer space. There are also two analogs for the sun (mean and true) which makes demonstrating the equation of time not only possible but also easier to visualize.

Photograph of Stella and our Planetarium Collection

Some more interesting facts about the STP projector. Each instrument requires 43 motors, over 12 miles of electrical wiring and more than 6,000 electrical connections. Total package price installed was around $ 146,575.00 with a 40 foot dome way back in 1963. This projector also has zooming earth and zooming moon projectors installed so during a planetarium program they could take visitors on a space flight and safely return.