Blue Moon in August – Two Full Moons this Month

Full Moon - BSN

(Best Syndication News) - The saying “once in a blue moon” probably is referring to this occasional event which will begin today. In August, two full moons will appear.

The blue moon event is not referring to the moon changing color. One full moon will appear tonight and another on the 31st. It will be almost another three years before the next blue moon occurs.

Originally, a blue moon was an extra full moon for the season. Maine Farmers' Almanac described the event as having four instead of three full moons in one season. When there was an additional fourth full moon for the season, it was deemed a blue moon.

In 1946, Phillip Hiscock wrote an article “Once in a Blue Moon” for Sky & Telescope magazine that described the blue moon event as having a second full moon in the same month.

Blue moons occur on average every 2.7 years. So it is not as rare as one might believe.

The reason the blue moon occurs is that it takes 29.5 days for the moon to orbit around Earth, and the calendar month typically has between 30 and 31 days. Eventually, a full moon will occur at the beginning of the month allowing for two full moons to arise in the same calendar month.

By: Julie Marcus
Science and Technology Writer

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