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.

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!

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.

Join us for our monthly recreational astronomy night meeting. This is where our members get to show their latest projects or give tutorials and tips on just about everything to do with astronomy.

Ajax's biggest family event of the year comes up on October 18. The Toronto Centre's Durham Region team will be in attendance with tables of crafts for little ghosts and goblins, an information booth, and a number of solar telescopes for safe viewing of the Sun's active sunspots!

Join us for International Observe the Moon Night to learn about lunar science and exploration, take part in celestial observations, and honor cultural and personal connections to the Moon.