What’s a Black Moon? You’ve probably already heard of a Blue Moon. There are two Blue Moon definitions, but the most common one is when we have two full moons in one calendar month. In that case, the ...

There’s been a lot of buzz online about the August “black moon”, happening later this week. While you’ve probably heard of a “blue moon” before, this might be the first time you’ve encountered its ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The new moon on Saturday, Aug. 23, will pass unseen. Lost in ...

When we have two full moons in a single month, we in astronomy call the second one a Blue Moon. That’s a relatively recent name and definition. In a 1999 article, folklorist Philip Hiscock traced the ...