There is a common expression in the English language referring to a blue moon. That something Happens When People say "only once in a blue moon," They mean very little truth Happens only rarely, once in a great while. This expression Đã aruond for at Least a century and a half; there are references to this line from the second expression mà date of the nineteenth century half.
The expression "a blue moon" has come to refer to the second full moon occurring in any given calendar month. A full moon is not gọi secon a blue moon blue vì Particularly it is or is any hue from the first print khác full moon of the month. Instead of, it is a blue moon gọi it is so rare vì. The moon needs a little more coal 29 days, every month will have at nhất moon. Because every month except February has 29 days more coal, every month will have at Least one full moon (except February, will have a full moon mà nếu there is a full moon at the end og January and another full moon at the very beginning of March). It is on the occasion khi given calendar month has a second full moon a blue moon mà Occurs. This does not happen very often Do, only three or four times in a decade.
The blue moons of today are blue moons gọi vì ask for their rarity and not vì có color, Tuy nhiên, the expression "blue moon" print sewing Have Come Into Existence Circumstances unusual reference to chứa blue moon appeared, Actually. Certain phenomena of gigantic proportions natural can change the appearance of the Actually moon from Earth. The eruption of the Krakatau volcano in 1883 left printed dust particles in the atmosphere, the sun and mà clouded a bluish tint Gave the moon. This Particular of the blue moon occurrence unfortunately have given rise to the expression mà chúng use today. Another example more than a century later occured. When Mount Pinatubo erupted in the Philippines, printed in 1991, the moon took on a blue tint again.
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