A rare Black Moon rises with the sun tomorrow Here's what to expect

Two people sit and look at a moonless sky.

Tomorrow (Aug. 23), the night sky will play host to an unusual lunar event known as a Black Moon.

While you won't see anything unusual (in fact, you won't see the moon at all), this event is still exciting because of its rarity.

So what's happening? A Black Moon isn't an official astronomical term, but it's used to describe unusual timings of new moon phases. This week's event falls under the "seasonal" definition: the third new moon in a season that contains four new moons. A new moon is the phase when the moon's sunlit side faces away from Earth, making it invisible in our sky as it rises and sets with the sun.