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It always wonder me what exactly people refer to when they say it happen Once in Blue moon and found wonderful explanation why it’s called Blue Moon.

For more than half a century, whenever two full moons appeared in a single month, which happens on average every 2 1/2 to 3 years, the second has been christened a ‘Blue Moon’ In another dictionary, we describe an unusual event as happening “Once in a blue moon” This expression was first noted back in 1821 and refers to occurrences that are uncommon, though not truly rare On past occasions, usually after vast forest fires or major volcanic eruptions, the moon has reportedly taken on a bluish or lavender hue.

Soot and ash particles, propelled high into the earth’s atmosphere, can sometimes make the moon appear bluish However, for the longest time, nobody knew exactly why the second full moon of a calendar month was designated as a blue moon One explanation connects it with the word ‘belewe’ from the Old English, meaning, ‘to betray’ Perhaps, then, the moon was ‘belewe’ because it betrayed the usual perception of one full moon per month Much less common is a double blue moon (two in one year) That only happens once in the same 19 year period.

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One Comment

  1. Cool explanation Thanks !


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