[C210N]

Should be an Orange moon.

First, it’s Halloween. Second, its the “election moon”, and the moon should be the proper color.

[Mr. K]

Last time there were quite a few people who actually thought a ‘blue moon’ meant the moon was going to turn blue for some reason. They were planning a watch party to go look at it.

And Trump was ‘not their president’ -if you catch my drift.

[Psalm 73]

"2 full moons to shine in October"

But not at the same time.

[DannyTN]

Apparently the first one is tonight.

[amorphous]

And btw, tomorrow (starting at sundown today) just happens to be the actual B'day of Jesus!

[Fiddlstix]

Bookmark

[Pilgrim's Progress]

Should would be askairt?

[Lonesome in Massachussets]

Any full moon on Halloween would pretty much have to be a "blue" moon, using the two full moons in the same calendar year definition. That definition is the result of a mistaken interpretation of the Old Maine Almanac published in the magazine Sky and Telescope in the 1946! The mistaken interpretation got into a quiz on NPR in the 1980's, and then into the popular 1980's game, Trivial Pursuit, and from there is became part of our culture.

The original definition in the Old Maine Almanac was the third full moon in an astronomical season containing four. It was called a "blue" moon because the other moons had seasonal names, and the last moon before winter was the Yule Moon. Astronomical seasons are delimited by the cardinal points of the sun, the equinoxes and solstices. In 19 solar years there are almost exactly 235 lunar cycles, to within about 90 minutes, on average. Going by the Maine rule, there would be 235 - 4 x 3 x 19 = 7 extra or "blue" moons every 19 years. The second moon in a calendar year rule also produces about 7 blue moons every 19 years, give or take. If January has a blue moon by this definition, March generally will too, because it's hard to fit two full moons into January and another one the following February, so two more turn up in March. This happened in 1999 and 2018. The average time between full moons is 29.5306 days or 29 days, 12 hours, 44 minutes, and 2.8 seconds.

[bgill]

IOW, the Earth, our moon and the Sun are right on course.

[yefragetuwrabrumuy]

The Marcels - Blue Moon

https://www.youtube.com/watch?v=v0fy1HeJv80

[P-Marlowe]

Blue moons are as rare as hens’ beaks.