Rare Black Moon Rises in Friday Night Sky
The last day of September will bring a rare lunar event that has not occurred since March of 2014, a Black Moon.
The term Black Moon has several definitions, but the most common definitions is the 2nd new moon in a calendar month. This is similar to the well-known Blue Moon, which is the name given to the 2nd full moon in a calendar month.
Since it is a new moon, it will not be a visible event as the side of the moon that is illuminated will be facing away from the Earth.
The last time that 2 new moons fell in the same month was March of Y 2014.
While some areas of the world, such as the United States, experience a Black Moon in September, it will not be the case for the entire world.
“It’s the 2nd new moon this month in all of the Americas, but not in Europe and points east from there,” said an astronomer.
This is because the new moon occurs at 8:11p EDT on 30 September, so for areas in the Eastern Hemisphere, the new moon will officially occur after the calendar flips to October.
However, these areas will not miss out on a Black Moon.
Another new moon will occur at the end of October, giving the Eastern Hemisphere a Black Moon right around Halloween.
While this type of Black Moon happens about once every 2.5 years, there are several other lunar events that fall under the same name.
Another type of Black Moon is when there are no new moons in a month. These can only happen in February and occur once every five to 10 years.