A rare Black Moon is about to pass through the night sky. Here's what to know about "seeing" this unique point in the moon's lunar cycle.

The rare lunar phenomenon is set to happen this weekend. The next black moon over Oklahoma won't return for another two years.

Here's what to know. When the moon is nearly between Earth and the sun, one side of the moon faces the sun, and that side is illuminated, but the side the Earth sees is dark. This is called the new moon phase of the lunar cycle — when the moon isn't visible at night.