A rare Black Moon will occur on Friday (19); how (not to see)

A rare astronomical event that will occur next Friday is one that cannot be seen in the sky: the so-called Black Moon. Besides being a new moon – a phase where the Moon is not visible because it faces Earth with its dark side – The third of four new moons in an astronomical season on May 19..

What makes this moon a rare phenomenon is that it has an extra moon like the famous Blue Moon. This is because the celestial rhythms are not perfectly aligned. Since the Moon revolves around the Earth 12.27 times a year, it’s fair to say that we experience a full moon and a new moon every month.

Only, in practice, this fraction allows us to have a few extra months, Black and Blue (non-astronomical terms). These redundant phases occur on average every two to three years. In the case of the Black Moon, there are seven extra new moons out of the 235 new moons that occur in almost exactly 19 years, a period known as the Metonic Cycle.

What exactly is a Black Moon?

Just like the term “Blue Moon”, “Dark Moon” is not a composite term and is not used in Astronomy., but has emerged from some religious and astrological concepts in the last decade. It is also referred to as the “mirror” version of the Blue Moon in the traditional Farmer’s Almanac, a publication that has been around since the 18th century in the United States, helping farmers plan their activities according to the phases of the Moon and Sun. loops.

“Black Moon” can mean many things, as it is not a scientific term. The most commonly used are below:

• The first definition conceptualizes the Black Moon as the second new moon in a calendar month;
• The second definition seen in the Farmer’s Almanac is that the Black Moon is the third of four new moons in a season of the year;
• the expression is also used when there is no new moon in a given month, this can only happen in February, because a lunar month is shorter.

It is important to note that in any of the lunar divisions, the Earth’s satellite does not change color, but simply reflects or stops reflecting sunlight. While the Black Moon is not an obvious phenomenon to observe, it does offer good opportunities. — due to the lack of bright light — to observe the last Eta Aquarids meteorites to hit our planet this month.