TCNJ has two observatories. The dome situated on top of the physics side of the science complex (left in the photo) is currently open for use by all astronomy classes, e.g., PHY162 and PHY163, as well as the general student population and the public. The second dome is used for astronomical research.
Directions to the observatory:
From the ground floor of the Physics Building, take the elevator to the 3rd floor. Take a left out of the elevator and follow the corridor around two corners. There is a flight of stairs on your left. (If you pass between two labs with full-length glass windows, you have gone too far.) Take the stairs up to the fourth floor.