Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The dark side of the moon is real — but it’s probably not ...

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 ...

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 ...

This rare lunar occurrence is coming at the perfect time. The seasonal “Black Moon” will appear – or rather, not appear – tonight, during one of the final nights of the Perseid meteor shower, ...