Blue Moon On Saturday
Dear Friends & Neighbors,
(Please click on red links & note magenta)
Did you see the Blue Moon on May 18, 2019, at 5:11 pm EDT (2111 GMT)? It was the third full moon in a season with full moons.
Blue Moon 2019 NASA reveals mystic meaning of INCREDIBLE Blue Full Moon, in the video “Blue Moon 2019 NASA reveals mystic meaning of Incredible Blue Full Moon“, below:
A Blue Moon was seen in Miami, Fl., on Saturday, May 18, 2019, marking the arrival of the May Full Moon – the so-called Flower Moon, in the video “Blue Flower Moon rises over Miami“, below:
An excerpt from wikipedia on Blue Moon, in italics, below:
A blue moon is an additional full moon that appears in a subdivision of a year: either the third of four full moons in a season, or a second full moon in a month of the common calendar.
The phrase has nothing to do with the actual color of the moon, although a literal “blue moon” (the moon appearing with a tinge of blue) may occur in certain atmospheric conditions: e.g., if volcanic eruptions or fires leave particles in the atmosphere of just the right size to preferentially scatter red light.
The term has traditionally referred to an “extra” full moon, where a year which normally has 12 full moons has 13 instead. The “blue moon” reference is applied to the third full moon in a season with four full moons, thus correcting the timing of the last month of a season that would have otherwise been expected too early. This happens every two to three years (seven times in the Metonic cycle of 19 years). The March 1946 issue of Sky & Telescope misinterpreted the traditional definition, which led to the modern colloquial misunderstanding that a blue moon is a second full moon in a single solar calendar month with no seasonal link.
One lunation (an average lunar cycle) is 29.53 days. There are about 365.24 days in a tropical year. Therefore, about 12.37 lunations (365.24 days divided by 29.53 days) occur in a tropical year. In the widely used Gregorian calendar, there are 12 months (the word month is derived from moon) in a year, and normally there is one full moon each month. Each calendar year contains roughly 11 days more than the number of days in 12 lunar cycles. The extra days accumulate, so every two or three years (seven times in the 19-year Metonic cycle), there is an extra full moon. The extra full moon necessarily falls in one of the four seasons, giving that season four full moons instead of the usual three, and, hence, a blue moon.
- In calculating the dates for Lent and Easter, Catholic clergy identified a Lenten moon. Historically, when the moons arrived too early, they called the early moon a “betrayer” (belewe) moon, so the Lenten moon came at its expected time.
- Folklore named each of the 12 full moons in a year according to its time of year. The occasional 13th full moon that came too early for its season was called a “blue moon”, so the rest of the moons that year retained their customary seasonal names.
- The Maine Farmers’ Almanac called the third full moon in a season that had four the “blue moon”.
- The frequency of a blue moon can be calculated as follows. It is the period of time it would take for an extra synodic orbit of the moon to occur in a year. Given that a year is approximately 365.2425 days and a synodic orbit is 29.5309 days, then there are about 12.368 synodic months in a year. For this to add up to another full month would take 1/0.368 years. Thus it would take about 2.716 years, or 2 years, 8 months and 18 days for another blue moon to occur.
- Using the common Sky & Telescope misunderstanding, when one calendar month has two full moons; the second one is called a “blue moon”. On rare occasions in a calendar year (as happened in 2010 in time zones east of UTC+07), both January and March each have two full moons, so that the second one in each month is called a “blue moon”; in this case, the month of February, with only 28 or 29 days, has no full moon. Under this misinterpretation a blue moon can be more frequent.
Gathered, written, and posted by Windermere Sun-Susan Sun Nunamaker
More about the community at www.WindermereSun.com
~Let’s Help One Another~
Please also get into the habit of checking at these sites below for more on solar energy topics: