You’ve likely heard the phrase “once in a blue moon,” but it does actually have a literal meaning too. The meaning today comes from two different lunar events. Buzz60’s Chloe Hurst has the ...

Only when the moon, Earth and the sun are perfectly aligned is the moon 100% full. And sometimes — once in a blue moon — the moon is full twice in a month (or four times in a season ...

The last blue moon, for example, occurred in October 2020. (That explains the expression "once in a blue moon.") Despite its title, however, it will not actually look blue. According to ...