Ready to explore the universe? Start your journey at the David Dunlap Observatory, home of Canada's largest optical telescope with a mirror measuring more than six feet (74") in diameter. Constructed in the 1930s, the Observatory is located in the heart of Richmond Hill, Ontario.
Throughout our regular season, join us for an evening of telescope observing, space crafts, space talks and tours. On program nights we check out a wide variety of celestial objects, including the Moon, Jupiter, Mars, Saturn and more.
The David Dunlap Observatory is home to a wide range of public viewing nights, special events and educational programs. Visiting the 23-ton Great Telescope is an awe-inspiring experience.