When it comes to different astronomical events, each of them have specific reasons and some history that make them either special or worth knowing, and while we may be familiar with solar and lunar eclipses in general but we seldom know the types and details of these eclipses.
A Blood Moon
Now when this phenomenon occurs, many wonder why does the moon turn red and to put it as precisely as possible, the blood moon definition, is when a total lunar eclipse occurs giving it a red shade or commonly known as the “moon turned to blood”.
Now this occurrence is not as simple as a total lunar eclipse, to fully understand what causes a blood moon is to understand the proper blood moon definition which is referred to as the series of special four complete lunar eclipses in a row that occur at 6 lunar months intervals. Where the Earth moves between the Moon and the Sun.
How often is there a blood moon?
Now for it to be a blood moon it has to go through the process of “four tetrads” which we explained above which is having four back to back total lunar eclipses which makes a blood moon. This was however the former and more detailed description of why does the moon turn red, but more recently all the events of a total lunar eclipse in a tetrad are called blood moons.
So how many blood moons have there been becomes hard to number. However if we were to give an answer to how often is there a blood moon, well, it doesn’t happen very often because if we combine the total number of tetrads from the 1st century to date according to the blood moon calendar there have only been 62 tetrads. So what does a blood moon mean can simply be put as a rare occurrence.
What makes a blood moon?
To sum it all up and giving a complete brief around what causes a blood moon and the true blood moon definition, we can say that it is when four back to back full lunar eclipses occur at 6 months intervals and its occurrence regarding the blood moon prophecy is mainly due to it being mentioned in the bible.
Now, as to why does the moon turn red is because of the earth lining in between the Moon and the Earth where the Moon is hidden off from the sunlight where the source is from the Earth’s atmosphere giving it the feeling of a moon turned to blood.