Don’t miss the rare black moon rising August 22—it will be years until the next one. Here’s why it will help you see the Milky Way

The celestial event happens once every 33 months, and it will be the perfect night for stargazing.

It’s safe to assume you’ve heard the term once in a blue moon, which refers to the rare occurrence when there is a second full moon in a calendar month. But you might not have heard the term “black moon.”