Join us at the DDO for a visit of the dome and check out the Administration building for Doors Open Richmond Hill!

Join us at sunset to learn to use star charts and basic observing techniques, then use your binoculars to follow a guided tour through the night sky, and stay after the tour to practice your new skills.

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!

Join us from the comfort of your home as we discuss about what exciting celestial events to look for each season.

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!

Enter a Digital Portable Planetarium and take a journey through the universe led by a DDO astronomer. We’ll tour the night sky, travel through space, and see immersive full dome movies. The unscripted format will allow guests to experience a variety of topics. Ask our astronomer questions and see the answers in a planetarium setting. Please note that all guests will sit on a clean floor. A registered adult must accompany all registered participants under the age of 16.

Enter a Digital Portable Planetarium and take a journey through the universe led by a DDO astronomer.

This March Break, join the David Dunlap Observatory to explore some of the dynamic action of space through comets, craters, and more!

This March Break, learn about the sun and practice safe solar observing!

The Solar System with all its planets, moons, and asteroids are all around us -- even in your own home!