Located on the York University campus, the Allan I. Carswell Astronomical Observatory houses two large telescopes, primary mirror diameters for which are 40 cm and 60 cm. Both are equipped with state-of-the-art electronic cameras. The smaller of the two telescopes will soon be replaced by a telescope with a mirror 1 meter across, making it the largest telescope on a university campus in all of Canada. The Observatory is an integral part of the astronomy curriculum, and astronomy students engage with the facilities starting in first year. Also, the Observatory is the hub of a wide variety of outreach activities.

Public Viewing on Wednesday Nights

The observatory welcomes public interest and highly promotes the field of astronomy to those who are interested. Our public viewing program runs all year round and is popular with the local and visiting communities. On public viewing nights, visitors are able to observe selected celestial objects in the presence of friendly staff, in addition to engaging in various on-hand presentations. The observatory is open regardless of weather conditions, even though viewing through the telescope is limited to clear skies. If it’s cloudy, drop in for a slide show and a tour featuring both of our telescopes. More information can be found here.

York Universe Radio Show on astronomy.fm

Download and listen to selected interviews and segments featured on YorkUniverse.  All archived audio clips are lower quality .mp3s between 5MB and 15MB in size.  Send us an e-mail if you would like the high quality versions! Also check out astronomy.fm and our Monday night online public viewing here.

Group Tours

The York University Observatory offers private tours for school groups, youth organizations, clubs, and large groups of interested individuals.  These can include slide show presentations, tours of our facilities, live demonstrations and hands-on activities, and of course, viewing through the telescopes when conditions permit.

On-Line Public Viewing

Monday nights, after the sun sets and the stars come out, we bring our online public viewing experience.  You can see live images from four telescopes/cameras and chat with the staff who will be more than happy to answer your questions.  Requests for objects to observe will be entertained.