(CNN) – So you've heard of a blood moon, and maybe even a blue moon, but what about a black moon?
The phenomenon reappears in North America on the 31st of July – for the first time since 2016. The rest of the world has to wait until August 30th.
But what does that mean anyway? Why is it important? Here's everything you need to know about this astronomical event.
Wait, what's black moon?
A black moon is basically the second new moon of the month, which is rare. It works similar to a leap year. A lunar cycle usually takes about 29 days, but our months are a bit longer. Sometimes we get two full or two new moons about every 32 months. The second full moon of a month is called blue moon, the second new moon black.
A black moon also marks a month when there are no new moons – which is only possible in February because of its few days. This is less common than the other type of black moon and occurs about once a decade.
What will I see during a black moon?
Honestly, probably nothing.
A black moon is really just a new moon moon, the only real meaning is that it's the second one. So you will not even see the moon because it fits into the sky. The moon will also be a supermond, which means the moon will appear larger than usual because it's closer to the earth, but because it's a new moon, you still can not really see it.
If you wanted it If it sounds even cooler, you might call it a "black supernatural moon".
But a darker sky makes for a better observation of the stars, and as luck would have it, the Milky Way is best seen in late summer. So if you can get away from the city and its light pollution, you're in luck.
Brandon Miller of CNN contributed to this report