It also happened to be a partial eclipse. This divided the solar year into four seasons based on the Solstices and Equinoxes. A 'blue moon' is not actually blue.
How often does a blue moon happen?
However, at any time of the lunar cycle when there is smoke or volcanic dust in the atmosphere, the Moon can appear to have a bluish hue when viewed from Earth. On September 26, , after severe forest fires swept across Canada and filled the upper atmosphere with smoke particles, people in Britain reported a blue moon. The 'Blue Moon' phenomenon is based on the Gregorian western calendar with a year divided into 12 months. As this monthly division is a human construct without a celestial correlation, the calendrical Blue Moon holds no significance to astrologers or astronomers.
It is likely that the old tropical Blue Moon with thirteen Full or indeed 13 New Moons within a Solar Year would be significant to some astrologers. In , there were two Full Moons in January and March in most time zones. This is sometimes called a double Blue Moon and takes place only about three to five times in a century.
This will happen next in Other combinations of Blue Moons also exist. Between and there are 20 years that have one seasonal and one monthly Blue Moon.
Types of Blue Moons Explained
The next time is in while the previous time was in Triple Blue Moons, a combination of one seasonal and two monthly Blue Moons in the same calendar year, happens 21 times in the same time span. The next is in , while the last time was in There can never be a double seasonal Blue Moon, as that would require 14 Full Moons in the same year, which is not possible because the time between two Full Moons is approximately How can Full Moon be in the daytime?
A Moon that actually looks blue, however, is a very rare sight. The Moon, full or any other phase , can appear blue when the atmosphere is filled with dust or smoke particles of a certain size: slightly wider than nm. The particles scatter the red light, making the Moon appear blue.
This is known as Mie scattering and can happen for instance after a dust storm, a forest fire, or a volcanic eruption. Eruptions like the ones on Mt. Helens in the US , and Mount Pinatubo in the Philippines are all known to have made the moon look blue.
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Some people even suggest the term once in a Blue Moon is based on these rare occasions, rather than the Full Moon definitions above. The Full Moon can look red if other sizes of dust particles fill the atmosphere or during Total Lunar Eclipses , which are much more common than Moons that look blue.
A totally eclipsed Moon usually looks red, and because of this coloring, it is sometimes called a Blood Moon. So, this was a rare opportunity to see a red Blue Moon.
If this wasn't enough, it was also almost a Supermoon , earning it the nickname Super Blue Blood Moon. A similar phenomenon is Rayleigh scattering , which occurs when light strikes a molecule of air. This scattering causes the sky to look blue in the daytime and red at sunrise and sunset. Topics: Astronomy , Moon , Calendar , Months.
Blue Moon Lunacy
Blue Moons can vary by time zone. Dates above are based on the local time in New York. Change location. Free online calendar with holidays for over countries worldwide.
Lunar Calendar 12222: Follow the Lunar phases in our Moon calendar 12222
Customize to your needs, print, or share. Whether you are looking forward to the holidays, new year, or any other event, try our Countdown App. Available for Android and iOS. Full Moons had given names in many ancient cultures.
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The Full Moon names we use today often reflect nature like Harvest Moon. The Full Moon is the moment the entire face of the Moon is illuminated by the Sun's rays. It is the 3rd primary phase. Each Full Moon has a name, except the Blue Moon.