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Image source, Getty Images
The best time to see the “Blue Moon” will be when the night of October 31st is darkest and the sky is clear.
It is not actually blue. It is a full moon, like all the others, the color with which most full moons are seen: light gray, milky white or silver.
What makes this phenomenon strange, which folklore has dubbed as “Blue Moon” or “Blue Moon”, is that From Lsome full in just one month, when the normal thing is to see one.
A lunar cycle, the period in which all phases of the moon occur, repeats approximately every 29.5 days.
If it coincides that the full moon occurs on the first or second day e the month has 31 daysThis is when a second full moon is likely to appear.
This is known as “Blue Moon”.
The month of February, which is 28 days old, will never see one.
Image source, Getty Images
This is what the Blue Moon looked like behind the dome of the Capitol in Washington DC in 2015.
When is the “Blue Moon” of 2020?
It is an unusual phenomenon that occurs every 2.5 years.
The last time this happened was on March 31, 2018.
This year it will appear in the sky in the night from October 31st to November 1st, when many countries celebrate Halloween and in Mexico the Feast of the day of the dead.
There was already a full moon on October 1st and by the end of the month we will be able to see the second.
Image source, Getty Images
This year coincides with Halloween.
Why blue?
As NASA explains on its website, the definition of a blue moon emerged in the 1940s.
At that time the Maine Farmer’s Almanac was being offered (the most trusted source for all things about the climate for nearly 200 years) such a twisted definition of the Blue Moon that many astronomers have had a hard time understanding this.
To explain the Lthe blue ones in plain language, Sky & Telescope magazine published an article in 1946 entitled “Once every Blue Moon”. The author, James Hugh Pruett (1886-1955) quoted the Maine almanac for 1937 and said: “The second (Full Moon) in a month, as I interpret it, is called the Blue Moon.”
This was not correct – assures NASA – but at least it could be understood.
Y thus the modern Blue Moon was born.
Image source, Getty Images
Krakatoa volcano in Indonesia once again ejected the ash on April 11, 2020.
Moons and volcanoes
Although what we will see was not a true blue moon, there are moons of this color.
But they can only appear blue after one vulcanic eruption.
In 1883, after the Krakatoa volcano earthquake in Indonesia, people said that blue moons could be seen almost every night.
With the force of the eruption, similar to a 100-megaton nuclear bomb, they rose high into the earth’s atmosphere clouds of ash whose particles made the moon look blue.
There have also been reports of Blue Moons in Mexico in 1983, following the eruption of El Chichón volcano, and in Washington state in 1980, following the eruption of Mount Santa Helena.
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