Join us at the lake This is your chance to learn about moon features, hone observing skills and maybe even earn a RASC Explore the Moon - Binocular or RASC Explore the Moon - Telescope certificate!

Join us for an evening of free public stargazing along the north shore of Lake Ontario at Millennium Square.

Our monthly City Star Party is the place to catch universe from within the city limits at Bayview Village Park. If you don't have a telescope then you will find many astronomers who would love to share a view.

Spoiler Alert! It's not Aliens!

Families will see a presentation on a variety of exciting astronomy topics, followed by age-appropriate celestial activities.

Are you a RASCTO Member with a telescope, but don’t know how to use it? The experts from RASC at the Richmond Hill David Dunlap Observatory can help!

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.

Families will see a presentation on a variety of exciting astronomy topics, followed by age-appropriate celestial activities.

Calling Volunteers! The Spring 2026 work party at the E.C. Carr Astronomical Observatory on Blue Mountain will be held on the weekend of May 01-03.

Join us at the lake This is your chance to learn about moon features, hone observing skills and maybe even earn a RASC Explore the Moon - Binocular or RASC Explore the Moon - Telescope certificate!

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

Join us for an evening of free public stargazing along the north shore of Lake Ontario at Millennium Square.