The Dearborn Observatory is open for public viewing every Friday night from 8 to 10 pm during the fall and winter months (Oct-March). The sessions are free and open to all. Reservations are required for the first hour but walk-ins are welcome in the second hour. All visitors should note that the dome is neither heated nor air-conditioned so please dress appropriately. Friday evening sessions are held "rain or shine." Unfortunately, the Dearborn is NOT ADA-accessible. Several staircases must be climbed in order to reach the telescope. For more information go to http://www.physics.northwestern.edu/about/dearborn-observatory/.
To make a reservation go to http://sites.northwestern.edu/dearborn/.
Cost: Free (deposit required for large groups)