Toronto's bright city lights are on before the sky even gets dark. This area of the city, looking west of Shaw Street, is Class 9 on the Bortle scale. | SkyNews
Happy birthday, Bortle scale

The Bortle scale has been classifying the darkness of your night sky for 20 years.

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Dark-sky sites across Canada

Use this SkyNews directory to find a dark-sky site near you.

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