Upcoming & Recent Events

9 January

DDO How to Use Your Telescope

Do you have a telescope, but don’t know how to use it? Come to the Richmond Hill David Dunlap Observatory can help! Bring your telescope to this workshop to have it assessed and to receive one-on-one instruction on its use outdoors!
9 January

DDO Gigantic Jupiter: The Gas Giant at Opposition

Jupiter is more than twice as massive than the other planets of our solar system combined! Join us at the Richmond Hill David Dunlap Observatory as Jupiter, the Earth, and the Sun all align in their celestial dance - an astronomical arrangement known as opposition.
24 January

DDO Astronomy Family Night - January 2026 - All About Auroras

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!

FEATURED NEWS

CAO Fall Work Party Report for October 2025

28 October 2025

On the weekend of October 3-5, about 18 Toronto Centre members and U of T students participated in the annual Fall work weekend at the CAO where preparing the site for the coming winter season was front and centre on the agenda.

CAO Mini Work party Report for July 2025

21 July 2025

On Saturday July 12, 20925, several RASC Toronto Centre volunteers attended our observatory property at the CAO to affect some needed maintenance.

CAO Work Party Report for May 2025

26 May 2025

On the weekend of May 2-5, 2025, about 24 Toronto Centre member volunteers participated in the annual Spring Work Party at our E.C. Carr Astronomical Observatory (CAO) on Blue Mountain.

About us

Welcome to the Toronto Centre of the Royal Astronomical Society of Canada. We’re Canada’s largest astronomy club with more than 600 members in the GTA who share a love of astronomy and the wonders of the night sky

Learn More

The Sky Tonight

Toronto

 Astronomical forecasts for different locations in the GTA and a monthly, free star map.