Once in a Blue Moon
You’ve probably heard about the saying “once in a blue moon” and wondered what magical things and creatures this phenomenon would bring? Or do you think it’s just a fiction? To answer your curiosity, look up in the sky on Thursday night because we will have a chance to find out just what those magical things are as we watch the rare lunar event coincide with all the beautiful fireworks of New Year’s Eve.
The phenomenon has nothing to do with color, so don’t expect a blue colored moon. It has everything to do with time and is referred to the rarity of the event.
“Blue Moon” is the term used to the second full moon in a calendar month. It’s an event that occurs every two and a half years but this Thursday’s blue moon is even rarer. It’s happening right on New Year’s Eve and that’s roughly once in every two decades.
So now you know that “once in a blue moon” actually means once every two-and-a-half years but if you want a more exact calculation, David Harper, a former professional astronomer from Cambridge, England actually did the math.
once in a blue moon = 1.16699016 x 10-8 hertz.
Be sure to check out the sky on New Year’s Eve because this phenomenon only happens once in a blue moon after all.
[via Homer Tribune]