The buzz right now centers on an event (or non-event, depending on how you think of it) happening Aug. 23. When an astronomical season, which is about three months long, includes four "new moons" rather than three, the third one is sometimes called a Black Moon. This happens about once every 33 months.

The black moon is occurring this weekend, but it won’t be visible from Earth. Here’s everything you need to know about the celestial event.