For one Saturday afternoon in October, the lights go down inside a 27-foot dome tucked into the basement of one of Detroit's oldest college buildings, and the ceiling fills with stars. The Wayne State University Planetarium will run free astronomy shows from 1 to 5:30 p.m. on October 17, 2026, as part of the university's Warrior Family and Friends Day, welcoming visitors into Old Main at 4841 Cass Avenue in Midtown.
The format is deliberately loose. Each show runs about 25 minutes and starts on the hour and half hour, so families can drift in and out across the afternoon rather than commit to a single timed screening. Doors stay open throughout, meaning guests who only want to peek at the dome, or who are working their way through the Family and Friends Day passport, can come and go as they please. The planetarium seats 60 people at a time, and eating and drinking inside the theater is discouraged.
The venue itself carries more history than most visitors expect. The planetarium was built in 1996 as part of a major renovation of Old Main, and its first projection system was an analog Spitz A-1, a hand-operated optical-mechanical star machine that ranks among the earliest models the Spitz Corporation produced. The current equipment is a Spitz SciDome IQ 2400, a digital fulldome system that projects films and live star talks across the entire dome rather than a single patch of sky. The room holds 59 seats under the dome, though the university lists capacity at 60 for public shows.
Old Main, the building that houses it, is older still. It opened in 1896 as Central High School, with a seven-story clock tower rising 147 feet above Cass Avenue. The planetarium's public programming normally runs on Friday nights at 6 and 7:30 p.m. A typical show is built in three parts: an interactive demonstration on size and distance in the solar system, a guided tour of the current night sky covering constellations, asterisms and planets, and a fulldome film. Admission is free and first-come, first-served, and visitors are asked to arrive at least ten minutes early because doors close promptly at showtime.
The Family and Friends Day schedule bends those rules on purpose. Instead of a hard start, the afternoon uses rolling showtimes and open doors so that the planetarium can function as one stop on a broader campus visit rather than a destination that requires planning around a single slot. That approach fits the planetarium's stated mission, which is to educate and excite both the Wayne State community and metro Detroit about astronomy, and to build scientific literacy among future students and their families through K-12 and community programming. The planetarium also runs private shows for school groups, math and science centers and community organizations, and serves Wayne State students enrolled in physical science courses and the astronomy bachelor's program.
For anyone who has never been inside, the appeal is simple: a free, short, walk-in astronomy show under a dome in a building that has been part of Detroit's Cass Corridor since the 1890s. The event is free and open to the public, with no reserved seating. More information is available through the Wayne State events calendar, and questions can be directed to planetarium contact Megan McCullen.