This happens seven times every 19 years. So, since tonight’s moon will be full, the second full moon this month on the 31st can be called a Blue Moon.
July will host a rare celestial moment called the blue moon.
Interestingly enough, blue-colored moons can be a possibility.
Blue moon was originally used as a phrase for something that never happens.
Blue colored moons could be more than a saying.
People who might exist near a consistient volcano or where can particular sort of woodland fires drop are certainly blessed with good luck and so find out a selenic hue… Considering the length of a month to be about thirty days, than we can safely say that a year has twelve full moons.
Whether blue or pale-shaded beige, the moon in full will offer us the privilege to see it twice this month.
They are a rarity, hence the term “blue moon“. Extra days tend to accumulate throughout the years so every two or three years we have the exclusive chance to see an extra full moon shedding light over the night sky. Knowing that in a year there are about 365.24 days, if you are to divide 365.24 with 29.53, you will get about 12.37 moon cycles. Therefore, if two full moons happen within the same month, then the second full moon is the blue moon.
The last blue moon was in August of 2012 and the next blue moon will be in January of 2018.
In an article on Blue Moons (http://www.skyandtelescope.com/observing/objects/moon/3304131.html) Sky and Telescope Magazine (S&T) indicates the second full moon in a month definition came about in a 1943 article.
The major question is: “How can there be thirteen moons in a year?” The term actually comes from the idea that a “blue moon” is the third or fourth full moon in a season (of three months). But if you want to see the moon in its blue color, then visit places where there are active volcanic eruptions occurring, like in Krakatoa when its volcano erupted in 1883. Yet, not only a blue moon, but also a blue sun and bluish clouds. That seems interesting too!