A second full moon in a calendar month will occur on May 31 and be best seen at moonrise on May 30. Why is the Blue Moon one of astronomy’s most misunderstood terms?

Do they really happen "once in a Blue Moon?” ...

Add Yahoo as a preferred source to see more of our stories on Google. A rare celestial event is set to light up the night sky this weekend, as what is known as a blue moon rises on May 31. But despite ...

The second full moon of May — a blue moon — will make an appearance this weekend.

Don't miss 2026's smallest full moon with this livestream from Italy with the Virtual Telescope Project. The 'Blue Moon' livestream will begin at 9:30 p.m. EDT (0130 GMT).

May's rare blue moon is still ahead, giving skywatchers one more chance to catch a full moon before June arrives. The second full moon of the month — known as a blue moon — will rise May 31, marking ...

What is it about the Blue Moon that inspires us to write songs and name beers after it?

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The so-called Blue Moon rose at dusk on Saturday, May 30, ...

Turns out the phrase has way less to do with the moon and way more to do with a decades-old misunderstanding You’ve probably said “once in a blue moon” a thousand times in your life. Maybe to describe ...