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?” ...

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

See the best images of the Blue Moon from around the world as a second dramatic moonrise occurred in the same month in a rare sky event.

Skywatchers are preparing for one of 2026s most beautiful lunar events as a rare Blue Moon rises alongside bright stars and ...

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.

This only happens once in a blue moon, literally. May's second full moon is almost here, and not only is it a rare blue moon, but it will also be a micromoon. The blue moon will take place soon, ...

Few astronomical terms have entered everyday language as successfully as blue moon. “Once in a blue moon” has become synonymous with something rare, yet the astronomical event itself is neither ...

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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).