The Perseids are the most reliably visible meteor shower at the most favorable part of the summer, the weekend of August 11th, at New Moon. If you have ever seen a shooting star, during a meteor shower you can expect to see many of them, appearing to radiate from the constellation Perseus in the northeastern sky. The meteors are created by particles of comet dust left in this part of Earth's orbit by a passing comet. Peter Millman, one of the first astronomers to work at the DDO, made the study of meteors like these the subject of his Harvard Ph.D. in 1932.

The Mars Opposition is our best opportunity to observe the Red Planet for the next several years. Join us at the David Dunlap Observatory to stage the next Martian Invasion of Richmond Hill.

This weekend tour introduces families to the wonders of astronomy through an indoor planetarium experience, craft activities for younger visitors and stargazing. Visitors will spend time in both the main building and observatory visiting the 1.88m (74") telescope, learning its history and getting to see celestial objects firsthand (weather permitting).

This weekend tour introduces families to the wonders of astronomy through an indoor planetarium experience, craft activities for younger visitors and stargazing. Visitors will spend time in both the main building and observatory visiting the 1.88m (74") telescope, learning its history and getting to see celestial objects firsthand (weather permitting).

Speaker: Paul Delaney, University Professor, Physics & Astronomy, York University

Join us at the Ontario Science Centre for our monthly Solar Observing on the TELUSCAPE observing pad. This is the area in front of the Science Centre's entrance. We use specialized telescopes that are safe to aim at the Sun. Check our home page on the Friday prior for go/no-go calls as this event is weather dependent.

Hover above the moon like an astronaut and get eye-to-eye with the planets. Find colourful stars, star clusters, bright nebulae and even another galaxy. 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. If you are thinking of buying a telescope, viewing with other people's equipment is the best way to make a good choice. If you have a telescope or binoculars, please bring it!

Explore the universe with members of the Royal Astronomical Society of Canada. Telescopes will be set up to give you amazing views of the Moon, the planets and more! Meet at the Chappell House Lawn. In case skies are not suitable for star-gazing on the scheduled date, the event will take place on Wednesday, June 20 at the same time.

Explore the universe with members of the Royal Astronomical Society of Canada. Telescopes will be set up to provide amazing views of the Moon, the planets and more! Meet at the Chappell House Lawn.

Everyone is invited to join us and Durham Skies on May 18 for stargazing at the edge of Lake Ontario. Take a free look through different kinds of telescopes (including solar-filtered scopes) to get close-up looks at sunspots, craters on the Moon, brilliant Venus and Jupiter.