The historic Detroit Observatory, on the corner Ann and Observatory streets in Ann Arbor, is owned by U-M and run by the Bentley Historical Library. The Astronomy Department partners with Bentley to host public viewing nights.
Viewing Nights are weather permitting only. Check the calendar or Facebook page (both shown below) for updates around 5 PM on the day of a viewing night. Building tours, run by the Bentley, are also on the calendar.