Blue Moon
Blue Moon Tonight ..!
Blue moon is an additional full moon that appears in a subdivision of a year.
A Blue moon is defined as any time there is a second full moon during a calendar month, according to NASA.
While most years have 12 full moons, this year has 13.
Blue moons are very rarely blue. Most are pale gray and white, resembling a moon on any other night.
Past :
The March 1946 Sky and Telescope article "Once in a Blue Moon" by James Hugh Pruett misinterpreted the 1937 Maine Farmers' Almanac.
"Seven times in 19 years there were and still are 13 full moons in a year.
This gives 11 months with one full moon each and one with two.
This second in a month, so I interpret it, was called Blue Moon.
