Globe Sundials of the World Globe

Pinawa Heritage Sundial Conceptual Design
Welcome to Sundials of the World!


The horizontal sundial presented on this page is located at Science North in Sudbury, Ontario.

This sundial, called Celeste, as well as the globe segment Terra were both designed by Tom Semadeni and installed in the spring of 1994.

The photographs and information were supplied by Science North.

Polaris Boulevard


This image shows Science North and Polaris Boulevard from the air. Polaris Boulevard sits in the centre of the photo. The photo is looking due north and the line of light-coloured interlocking brick at the centre of the walkway marks a due North-South line (longitude 80 59' 45.70"). Celeste is the large stainless steel sundial at the near end of Polaris Blvd. The dome of Terra sits between Celeste and the main doors of Science North. 

Polaris Boulevard is the main entrance walkway to Science North. The centre line of Polaris Boulevard (indicated by the lighter bricks) runs due north and perfectly bisects the main Science North exhibit building. 

In this photo you can see the main stainless steel building on the hill in the background. The centre of the sundial neatly divides the building into two equal halves.

Why is it called Polaris Boulevard? 

At night, if you stand on the North-South centre line of Polaris Boulevard (marked with lighter interlocking bricks) and look skyward due north over the science centre building, you will see Polaris, the North Star. It will be directly over the tall spire on top of the main exhibit building, at an angle of 46.5, the latitude of Sudbury. (The spire is hidden in the photo by Celeste, the large sundial. It wouldn't show up anyway, since it is very thin.) There are two astronomical tools on Polaris Boulevard: Celeste, the large stainless steel sundial, and Terra, a segment of the globe oriented with Sudbury directly at the top.

Polaris Boulevard with the sundial Celeste.

The sundial Celeste. Celeste:

Celeste is a large stainless steel sundial at the south end of Polaris Blvd.  The gnonom is inclined at an angle of 46.5, the latitude of Sudbury.

The hour markings are for local standard time. A view of the hour markings.

Terra Terra:

Terra is located between Celeste and the front doors of Science North. The benchmark at the centre of Terra is: 46 28' 12.00" N & 80 59' 45.70" W. This view is of Terra from Celeste, looking due north up Polaris Boulevard. Terra sits as a shallow 'hump', showing just a portion of the globe with Sudbury at the very top. This is just the way one perceives the world. You are always at the top - the earth slopes away from you in all directions, wherever you are. A small brass ring marks the position of Sudbury. The main graticule is marked off in 10 degree increments with inlaid stainless steel strips. The one exception is longitude 81 W which runs through Sudbury and almost directly through Science North (it is actually about 200 m to the west, running through the Lily Creek Marsh).

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