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24 September

DDO: Sunday Sungazing - September 2023

Safely observe the sun with us! During these family-friendly sessions, a DDO Astronomer will answer your questions about our closest star: the sun!
23 September

Astronomy Speaker's Night - Curiosity’s Got its Head in the Clouds: Eleven Years of Cloud Observations from Gale Crater, Mars

Come to the DDO where Conor Hayes, a PhD candidate in Physics and Astronomy at York University, is presenting about the Curiosity rover on Mars!
27 August

DDO: Sunday Sungazing - August 2023

Safely observe the sun with us! During these family-friendly sessions, a DDO Astronomer will answer your questions about our closest star: the sun!
6 August

Astronomy Speaker's Night - Building a Telescope the Size of the Earth

Come to the DDO where Dr. Galanis, a postdoctoral fellow at the Perimeter Institute for Theoretical Physics, is presenting about Building a Telescope the Size of the Earth!
6 December

Recreational Astronomy Night - Dec. 6, 2023 ON-LINE ONLY

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.
1 November

Recreational Astronomy Night - Nov. 1, 2023

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.
4 October

Recreational Astronomy Night - Oct. 4, 2023

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.
6 September

Recreational Astronomy Night - Sep. 6, 2023

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.
25 July

RASCTO Backyard Astronomy at Richmond Hill Public Library

Have you ever looked up at the night sky and wondered what's out there?
29 July

Astronomy Speaker's Night: Taking Back the Night Sky: What We Can Do About Light Pollution (CANCELLED)

Abstract: In this talk, Quinton Weyrich will discuss his experience as an Astronomer in Residence at Killarney Provincial Park, the first provincial park in Ontario to be designated a dark sky preserve. He will discuss what commitments a location must make in order to be designated a dark sky preserve and why the reduction of ambient light within them is scientifically and culturally valuable.