Contact Details

123 Hillsview Drive, Richmond Hill, ON, Canada

About David Dunlap Observatory

Want to know what’s up in the sky this week?  The David Dunlap Observatory is home to the largest optical telescope in Canada.  You’ll find out what’s new in space, sci-fi and right here at the DDO. We welcome school groups, Girl Guide or Scouts and special events year-round. Our programs meet Ontario curriculum requirements and they’re fun!

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