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Upcoming & Recent Events

18 November

Speaker's Night: The Current State of Water on Mars

Mars was once a much warmer and wetter world, more similar to Earth than the cold polar desert we see today. But water still persists in various forms on Mars! Dr. Tanya Harrison, a "Professional Martian," will discuss how scientists keep discovering water on Mars, and what implications it might have for life.
20 November

RHDDO Spectacular Saturn - "Saturn Big and Bright

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.
28 November

RHDDO Astronomy Family Night - November 2026 - An Icy Alignment

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

FEATURED NEWS

2026 Annual Meeting

Information for the 2026 Annual Meeting

This page contains information regarding Annual Meeting of the RASC Toronto Centre held on December 2, 2026.

CAO Spring 2026 Work Party

The Spring Work Party was held at the E.C. Carr Astronomical Observatory (CAO) on Saturday, 2 May. Members of the CAO Committee were joined by other members of the Toronto Centre as well as 7 volunteers from the David A.

Main Telescope at the CAO Upgraded

During the Spring Work Party from May 2nd - 3rd, the control system on the the main telescope in the Geoff Brown Observatory was upgraded to a new technology platform (MKS 6000 control system). This mini-project involved:

Next Speaker and Social Night at the RHDDO - May 20th

On May 20th the Toronto Centre will be hosting a simulcast of our Speaker's Night at the historic David Dunlap Observatory in Richmond Hill followed by a s

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

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The Sky Tonight

Toronto

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