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20 April

City Star Party: Bayview Village Park - April 2026

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.
24 April

Millennium Square Public Star Party - April 24 or 25, 2026

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

City Star Party: Long Branch Park - April 2026 - Explore the Moon

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!
26 April

DDO: Sunday Sungazing - April 2026

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

CAO Spring 2026 Work Party

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.
1 May

DDO Astronomy Family Night - May 1, 2026 - The Flower Moon

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

Recreational Astronomy Night - May 6, 2026

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.
15 May

DDO Astronomy Family Night - May 15, 2026 - New Moon Super Moon

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

City Star Party: Bayview Village Park - May 2026

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.
20 May

Speaker and Social Nights at the RHDDO and Online

Speaker: To be announced Title: To be announced Abstract: To be announced Who can attend: Everyone Fee: No Charge Locations:
22 May

Millennium Square Public Star Party - May 22 or 23, 2026

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

DDO: Sunday Sungazing - May 2026

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