Star formation is incredibly inefficient. Compared to the available amount of gas in molecular clouds, only a few percent of the cloud forms stars. In this talk, I will talk about how dust is created, grows, and destroyed in the interstellar medium (ISM). Understanding the size and evolution of dust grains in ISM is significant in answering why star formation is a very inefficient process in the universe.

Wondering what's happening above your head in the sky this month? Find out more about the Zodical Light to the Messier Marathon to everything in between, including comets, planets and spaceflights!

Come out to learn the late-winter/early-spring constellations and enjoy stargazing behind the Courtice Community Complex.

Learn about the World Asterisms Project and hear from expert panelists about storytelling and astronomy.

Join us online to learn basic astronomy that you can do on your own from your backyard! We'll share tips on encouraging girls to engage in astronomy and highlight the women of Harvard who laid the foundation of modern astronomy.

Join us online to learn basic astronomy that you can do on your own from your backyard! The spring sky hosts both very bright stars and very dim galaxies. We'll talk about the system astronomers use to measure and report the brightness of celestial objects - from luminosity to absolute and apparent brightness, to surface brightness.

Join us online to learn basic astronomy that you can do on your own from your backyard! With the moon waxing in the evening sky, this is the perfect time to watch the terminator slide across the giant and ancient lunar basin of Mare Imbrium.

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

No-Go for Staurday due to clouds. We're sad to say that that concludes out 2023 season. We hope to see you next year in April!

Join us for an evening of free public stargazing along the north shore of Lake Ontario at Millennium Square. Observe the Moon, Jupiter, Saturn, and stars through our telescopes!