Observatory Telescope

The telescope in our observatory is a 14" diameter, Schmidt-Cassegrain, Celestron C-14 mounted on an Astro-Physics GTO 1200 mount. The telescope has a focal length of 3910 mm, is f/11 without a reducer (f/7 with), and has four eyepieces available for use. The telescope is used by our astronomy classes in the fall and by the Astronomy Club.

Senior student projects, using our SBIG ST-9 CCD camera, are a further use of the facility. Astrophotography, and variable stars have been two recent projects.

How to get to the Observatory

  1. Go to the MacNaughton Building
  2. Take the elevator to the 5th floor
  3. Climb stairs to roof

Observatory Tour Information

The physics department is happy to offer tours for interested members of the community during the spring, summer and fall months. Objects you can expect to see, depending on the time of year, include the moon, planets like Venus, Jupiter (and its moons) and Saturn (its rings and its moons) in addition to Messier objects and common stars. If you are interested in a tour of the observatory - which includes a brief astronomy lecture prior to heading up to the observatory - or have any questions, please contact observat@uoguelph.ca . A tour guide would be happy to answer any questions you may have.

The telescope is not operational and repair attempts have been unsuccessful.   In addition, the MacNaughton Building will be under major construction during the late spring and summer of 2020.   Unfortunately, we will not be able to offer any tours at this time. Please check back after September 30, 2020


University of Guelph, MacNaughton Building, 7th Floor (rooftop).

Main Telescope:

14" diameter, Schmidt-Cassegrain, Celestron C-14.

Group Accommodation:

1-8 people, children accompanied by an adult. Up to 20 people can be accommodated upon request.


Approximately 2-3 hours.

Start time:

Varies depending on target objects, typically 30-60 minutes after dusk.


Adapter for photography with Canon SLR cameras. Long-exposure pictures allow for observing objects too faint to see with just your eye and the telescope.


Clear nights are best for viewing. The observatory is not heated so outdoor-appropriate attire is required.


The cost is dependent on the size of the group and the ratio of children to adults. $50 for small groups requiring only one tour guide, $100 for large groups requiring two tour guides.