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6 September

Millennium Square Solar Observing - September 2025

Come join us along the Lake Ontario shoreline to safely observe exciting sunspot activity and solar prominences through our solar telescopes! The Sun has been very active lately, producing auroras over Canada and around the world.
13 September

DDO Astronomy Family Night - September 2025 - Who Really Discovered Neptune?

Families will be introduced to the wonders of astronomy through a presentation on a variety of exciting astronomy topics, followed by age-appropriate celestial activities!
20 September

DDO Spectacular Saturn - The Ringed Planet at Opposition 2025

Join us for the wonders of astronomy through a presentation on the ring planet Saturn, followed by an age-appropriate celestial activities and a demonstration of the 74” telescope.
26 September

Millennium Square Public Star Party - September 26 or 27, 2025

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

City Star Party: Bayview Village Park - September 2025

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 October

Millennium Square Public Star Party - October 24 or 25, 2025

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