What is a blue moon?

In: Moons

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Answer

A "blue moon" is the second full moon to occur in a calendar month. It happens rarely, hence the phrase, "Once in a blue moon."

Aurelia and Blue Moon are hypothetical examples of a planet and a moon on which extraterrestrial life could evolve.

It might refer to the fictional satellite, called Blue Moon, of a hypothetical planet (Aurelia) where it was theorized that life had begun. It was an exercise underwritten by National Geographic.

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First answer by Joepoidog. Last edit by Otivaeey. Contributor trust: 44 [recommend contributor]. Question popularity: 55 [recommend question]

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Wikipedia: Blue moon

Wikipedia: Aurelia and Blue Moon

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