The Bentley Historical Library is open by appointment only for U-M faculty, students, and staff. Please see our full announcement here.


As the second oldest building at U-M and a long-time hub for foundational research, the Observatory is a true campus treasure. Maintaining the aging facilities; keeping the on-site museum in top condition; and sponsoring activities for students, local researchers, and the public are costly endeavors.

Giving to the Detroit Observatory can help ensure that this Michigan icon remains a part of the wide- ranging experience that students, faculty, and visitors have come to expect from our great University.

Please support the Observatory by making a gift today.