Friday is one of those days that we only have once in a blue moon.
In fact, this Friday July 31,st will actually be a blue moon when it turns full at 6:43a.m. ET. That's because it will be the second full moon in the month.
Unfortunately, the rarity of the blue moon isn't quite as rare as it sounds since there is more than one kind of blue moon.
This week's blue moon is all about the rarity of having two full moons in the same month. Usually that happens about once every 2.6 years, although in 1999 it happened twice in three months. The next time skywatchers are likely to see a blue moon is in 2018.
“The terms seems a little convoluted as to why the term blue was used,” The Weather Network meterorologist and science writer Scott Sutherland tells Yahoo Canada News.
“The Farmers' Almanac gives the original seasonal definition as being four full moons in a season rather than three full moons,“ says Sutherland.
“It seems that may have just been following the system for naming all theRead More »from You won't see a blue moon like this again until 2018