CANADA: Turn your eyes to the skies Friday morning for a rare cosmic event that occurs, well, once in a blue moon.
July 31 marks the second full moon of the calendar month, also known as the “blue” moon.
Typically, the Earth experiences 12 full moons each year, one in each month. But some years have 13 full moons, and one of those extra moons is called a blue moon.
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