A 'rare' black moon is set to rise tonight/ Saturday morning– but what exactly is the lunar event and will we be able to see it?

 From blood moons to strawberry ones and those of the ‘super’ variety, it can be difficult to keep up with all the different names given to the Earth’s natural satellite.

The latest causing excitement among skygazers is the so-called black moon, however there are several definitions about what it actually is.

Most experts agree the term black moon refers to the second new moon in a calendar month.

Even though it will be nearly invisible to skywatchers, a rare Black Moon will be in North American skies today (Sept. 30).

A Black Moon is a newer term that refers to the second new moon in a month. The moon goes through regular phases because of its changing alignment with the Earth and the sun. The new moon phase occurs when the sun is completely illuminating the far side of the moon, making the Earth-facing side completely dark and nearly impossible to see.

But just like the term Blue Moon — which refers to the second full moon in a month — the term Black Moon has no scientific significance, at least not usually. The exception is when the new moon blocks the disk of the sun in the sky, producing a solar eclipse.

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