[AZ-Observing] Blue Moon is Wrong

I listened to NPR yesterday afternoon. They interviewed Kelly Beatty, 
executive editor of S&T, about the use of the term blue moon when a full 
moon occurs twice in a month. He said that term was in error and it was 
an error they started in an article in 1947. An amateur had done some 
research on the use of the term blue moon but was not that thorough. The 
term Blue Moon generally means a rare event, but it does not mean two 
full moons in a month.

As an aside, gad were there a lot of jet trails over my place last 
night. Does anyone know if there was something going on or were the 
atmospheric conditions just right?
Stan
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