Nannette Richford
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Rare Blue Moon

1/29/2018

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January 31 blue moon
Look to the skies on January 31 for a glimpse of a rare blue moon.
Today's photo is a blue moon. The color isn't real, of course, but there is something about the possibility that tickles the imagination and brings out the child in all of us. Most of you are probably aware that we will experience the first blue moon of 2018 on January 31. 

A blue moon has nothing to do with color. It is the term used to refer to the second full moon in a month. Originally it referred to the third of four full moons in a season. Either way, a blue moon is rare, giving rise to the phrase "Once in a blue moon" meaning something occurs very rarely, but is not impossible.

Even though the astronomical blue moon is not actually blue, it is possible for the moon to appear blue. This can (and has) happened when ash, dust or smoke fills the air and causes the moon to appear blue-colored. This can happen with a forest fire, but most commonly happens from a large volcanic eruption. Because the dust particles must be very small, and atmospheric conditions just right, it is rare to see a blue-colored moon.

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