David Dunlap Observatory

Explore the universe at the David Dunlap Observatory! The Royal Astronomical Society of Canada, Toronto Centre, offers wonderful education and public outreach programs from May to November. Inside the Observatory is Canada’s largest optical telescope with a primary mirror measuring more than six feet (74″) in diameter. Constructed in the 1930s, the Observatory is located in the heart of Richmond Hill.

David Dunlap Observatory
123 Hillsview Drive
Richmond Hill

Ontario
L4C 1T3