Unlike a supermoon or lunar eclipse, a Black Moon isn't something you can watch unfold in real time. During the new moon phase, the moon is positioned between Earth and the sun, so its unlit side faces us, rendering it invisible against the bright sky.

The phenomenon coming up on Aug. 22 to 23 occurs only once every 29 months and offers a great opportunity for stargazing.

Tonight's August new moon will be a rare lunar phenomenon to watch. Here's what to know about the black moon, when, where and time to watch today