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How Many Stars?

Families or anyone interested in the stars, the environment, or just curious

An experiment to determine the quality of the nighttime sky


The nighttime sky is not only spectacular, but also filled with hidden wonders. Wonders that you can discover, but only if you can actually see the stars. Unfortunately the sky is often obscured by light pollution, especially in urban regions.

Performing the following experiment will not only be a good introduction to astronomy, but it will help you determine the quality of the observing conditions in your neighbourhood and also suggest ways to improve them if necessary.

Counting Stars


Préparé par l’équipe scientifique YES I Can! à l'Université McMaster,
pour l'Agence spatiale canadienne