A Black Moon rises Aug. 23, though you won't see it. Its timing makes it a rare lunar event. On Aug. 23, the night sky will play host to an unusual lunar event known as a Black Moon. While you won't actually see anything unusual (in fact, you won't see the moon at all), this event is still exciting because of its rarity.

Stargazers will soon get the chance to experience a rare celestial event known as a Black Moon, set to occur this week.