Today we will see a rare "blue moon"

Today the whole world can observe the "blue moon". This is a fairly rare event, but the color of the natural satellite of the Earth is irrelevant. July 31 will be the second full moon this month — an event that happens once in 2.7 years.

Usually one year is 12 full moons, one for each month. However, in some years, including in 2015, thirteen full moons. One of these "extra" full moon called "blue Moon". Lunar (synodic) month lasts 29,530589 earth days, in short all months except February. This mismatch leads to the appearance of "extra" thirteenth full moon in some years.

The name "blue Moon" comes from the English term "Blue Moon" and the corresponding idiomatic expression "Once in a Blue Moon" meaning "very rarely". Originally, "blue Moon" was called the third full moon of four in one block (usually in a three-month quarter, only three full moons). However, after 1946, "blue Moon" is the second full moon in one month. Since 2 July of this year it was a full moon on July 31 we will observe the "blue moon."

So if suddenly on Friday evening you will feast your eyes on the sky, don't expect to see another color of our natural satellite (although, of course, sometimes the Moon may have a bluish tint). Just keep in mind that you witness a very rare celestial event. published

P. S. And remember, just changing your mind — together we change the world! ©

Source: hi-news.ru/eto-interesno/v-pyatnicu-mozhno-budet-nablyudat-redkuyu-golubuyu-lunu.html