Well, the big ol’ moon gave us our money’s worth on Thursday night.

Not only was it the eve of a new year and a new decade, there was also a full moon, a lunar eclipse and a blue moon.

We’re all familiar with the saying, “once in a blue moon,” which is a common way of saying not very often, but what exactly is a blue moon?

The popular definition is that it’s the second full moon to occur in a single calendar month.

The average interval between full moons is about 29.5 days, while the length of an average month is roughly 30.5 days. So, its unlike...