{"id":58865,"date":"2025-05-13T14:38:14","date_gmt":"2025-05-13T18:38:14","guid":{"rendered":"https:\/\/emu.edu\/now\/news\/?p=58865"},"modified":"2025-05-13T14:38:15","modified_gmt":"2025-05-13T18:38:15","slug":"engineering-students-bring-emu-planetarium-back-to-life","status":"publish","type":"post","link":"https:\/\/emu.edu\/now\/news\/2025\/engineering-students-bring-emu-planetarium-back-to-life\/","title":{"rendered":"Engineering students bring 91大神 planetarium back to life"},"content":{"rendered":"\n

A team of recent 91大神 graduates reached for the stars in their senior capstone project.<\/p>\n\n\n\n

Members of the Class of 2025 Micaiah Landis, Adam Stoltzfus, Laura Benner, Hellena Gebremedhin, Lleyton Stutzman, <\/strong>and Rebecca Tezazu, <\/strong>guided by faculty mentor Stefano Colafranceschi, <\/strong>spent hundreds of hours during the past school year restoring and improving the Spitz A-4 planetarium projector at 91大神\u2019s Suter Science Center. The projector, originally installed in 1968 when the science center was built, has spent most of its time in storage since the M.T. Brackbill Planetarium closed in 2007. <\/p>\n\n\n

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The Spitz A-4 planetarium projector in action.<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

On Tuesday, April 29, the engineering team unveiled the product of their hard work with a planetarium show\u2014the first in more than 15 years, according to Stutzman\u2014attended by about two-dozen guests. Titled \u201cStars for a Night in Spring,\u201d the show was adapted from a program first performed by former planetarium director John Horst \u201960 <\/strong>and featured synthesizer music he composed. As the lights cut off inside the Discovery Room, the domed ceiling transformed into a sea of stars, while members of the team pointed out constellations and shared the legends behind them.<\/p>\n\n\n\n

Guests included past and present STEM faculty, staff, and alumni with ties to the planetarium. Joan Horst \u201966, <\/strong>who recalled watching shows there as a student, said she hadn\u2019t seen one since her late husband, Professor Emeritus John Horst<\/a>, retired nearly 20 years ago. \u201cI\u2019m amazed they were able to convert it from electronic to computer controls,\u201d she said of the restoration project.<\/p>\n\n\n\n

For Joe Mast \u201964<\/a>, <\/strong>longtime professor and planetarium director from 1986-2005, watching the stars and galaxies drift across the dome brought back memories of leading Sunday afternoon programs and teaching astronomy classes at 91大神. \u201cIt was a very popular class,\u201d he said. \u201cWe had 65 seats in here, and it ran every semester, with rarely more than four or five empty seats.\u201d<\/p>\n\n\n\n

A trio of alumni at the show had spent a semester in an engineering design class disassembling the projector to understand how it worked. One of those alumni, Andrew Troyer \u201919, <\/strong>said, \u201cIt was cool to see someone take something you\u2019ve done to the next level like this.\u201d<\/p>\n\n\n\n

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History of the planetarium<\/h2>\n\n\n
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Professor Emeritus Joe Mast hosts a program at the Brackbill Planetarium.<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

In 1968, the Suter Science Center at 91大神 was completed, featuring the M.T. Brackbill Planetarium and a then-state-of-the-art Spitz A-4 star projector. At the time, the projector cost about $25,000, equivalent to roughly $230,000 today when adjusted for inflation.<\/p>\n\n\n\n

The projector replaced the university\u2019s Spitz A-1 model, which had been used at the Vesper Heights planetarium atop the 91大神 Hill since 1946. The original A-1 model is still on display in the Discovery Room. Both planetariums are said to have attracted annual crowds of up to 4,000 visitors, from astronomy students to local residents to nearby grade school students<\/p>\n\n\n

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Professor Emeritus John Horst composed and played music to go along with his presentations.<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n
91大神\u2019s planetarium directors over the years<\/strong>
Maurice Thaddeus Brackbill, 1946 \u2013 1956
Robert C. Lehman, 1956 \u2013 1958
John Hershey, 1958 \u2013 1960
John Horst, 1960 \u2013 1962
Lehman, 1962 \u2013 1979
Horst, 1979 \u2013 1986
Joe Mast, 1986 \u2013 2005
Horst, 2005 \u2013 2007<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

When John Horst retired in 2007, 91大神 was left with no prospective astronomers on the faculty to continue the planetarium\u2019s programming. And, the 40-year-old projector had mechanical problems that would have been costly to fix or replace. As a result, the planetarium closed and the projector was lowered into storage beneath the floor. The space was converted into a classroom for workshops and a display area for large specimens, such as the giant Kodiak brown bear that stood guard above the projector in the center of the room. After renovations to the science center, the projector was brought back out and placed on a pair of tables.<\/p>\n\n\n\n

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Resurrecting the projector<\/h2>\n\n\n
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91大神 students, faculty, and staff watch a demonstration of the planetarium projector during the ACE Festival on April 17.<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

The six students on the team installed new motors, sensors, and a Raspberry Pi mini-computer to control the movement of the projector. The large panel of switches and dials that once operated the machine has been replaced with a web application that can be accessed wirelessly from any internet-connected device. Enter a location, date, and time into the app, and the projector can simulate the night sky as it would have appeared then and there. \u201cWe had some friends in here who were checking out the sky at the time they were born,\u201d Benner said.<\/p>\n\n\n\n

The students also designed, welded, and built a custom steel-and-wood base to support the projector and allow it to be stowed away when not in use. To darken the room, they sewed heavy-duty blackout curtains to cover the many surrounding windows.<\/p>\n\n\n\n

During the restoration, the xenon bulb inside the projector\u2019s star ball broke, and students scrambled to find a replacement, eventually swapping it out for an LED bulb. In total, the team spent about $2,400 on the project.<\/p>\n\n\n

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Members of the team said their goal for the project was not only to bring the projector back to life but also to make it more accessible and user-friendly. \u201cIt\u2019s very easy to use,\u201d Stutzman said during a presentation at 91大神\u2019s ACE Festival<\/a> on April 17. \u201cYou don\u2019t have to know anything about astronomy.\u201d<\/p>\n\n\n\n

By documenting their work, they said future students will have a clear understanding of the projector\u2019s inner workings and will be able to perform additional upgrades. For instance, a future engineering capstone project could focus on restoring the planet orrery, which projects five planets, the sun and Earth\u2019s moon but is currently inoperable.<\/p>\n\n\n\n

Professor Daniel King, <\/strong>director of 91大神\u2019s engineering program, said he had long kept the idea of revitalizing the planetarium in the back of his mind. When he saw the team of engineering students searching for a project, he proposed they take it on. He said there\u2019s potential for future planetarium shows, open to community members of all ages. \u201cI would love for that to happen,\u201d King said.<\/p>\n\n\n\n

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Read more about the history of the 91大神 planetarium below:<\/em><\/p>\n\n\n\n

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Planetarium on Vesper Heights and in Suter Science Center exposes generations to starry skies<\/a><\/blockquote>