#orphannibal (exploring the Toronto shooting locations of #orphanblack and #hannibal)
The David Dunlap 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, Ontario. The building is 61 feet in diameter and weighs 80 tons. The telescope itself weighs 23 tons (without its primary mirror). The entire dome rotates 360 degrees on a cable system.
Dr. Tom Bolton used the DDO 74” telescope to confirm the existence of black holes in 1971.