The David Dunlap Observatory, in Richmond Hill, Ontario, houses the largest telescope in Canada. 

The Royal Astronomical Society of Canada, Toronto Centre, operates the 74-inch reflecting telescope and is providing public education and outreach programs at the DDO.  The Society has been involved with the David Dunlap Observatory since it first opened its doors in 1935 and we're proud to be part of its renaissance as an educational facility.

Public events are held most Saturday nights from early summer through the fall months. For more information check out the Tickets and more page.  We have limited space available for public viewing nights and tickets book up quickly.

We hope that you'll join us for public viewing nights and many special events under the stars.