Black Moon

Black Moon is a natural phenomenon that is hard to observed. Most experts agree the term black moon refers to the second new moon in a calendar month. Joe Rao from space.com explains: "A second full moon in a single calendar month is sometimes called a blue moon. A black moon is supposedly the flip side of a blue moon; the second new moon in a single calendar month."

The black moon event will take place in the early hours of Saturday morning at 1:11am (GMT) for those in the Western Hemisphere.

The black moon will coincide with Halloween for those in the Eastern hemisphere.

Unfortunately, you won’t actually be able to see it as the moon will appear invisible. It will just be very dark.

The last black moon was in March 2014 and the next one after this year’s is expected in 2019.