There's going to be a rare "black moon" on Friday night


On Friday night, a rare lunar phenomenon will occur, called a black moon — or rather, the second new moon within a one-month period. But good luck trying to see it, because you won't be able to. Sorry!

According to, the lunar calendar and our Gregorian calendar typically line up quite neatly — there is usually one full moon and one new moon each month. Some months, though, there is a second full moon called a blue moon, when eager amateur astronomers get to enjoy two nights of a full moon.

A black moon is basically the opposite of that phenomenon. It's a repeat new moon, meaning that for the second time this September, the night sky will look completely empty. 

Shutterstock / BlueRingMedia

According to, black moons happen about once every 32 months. 

It's a cool phenomenon, but it's one you absolutely can't see happening. Enjoy the darkness, everyone!