August 31, 2012 will see a second full moon for the calendar month, commonly referred to as a Blue Moon. The first full moon for the month was seen on the night of August 1.
There are three different circumstances in popular culture in which a moon can be called “blue:” when the moon actually appears blue, when there are three full moons in a season, or like tonight, when there are two full moons in a calendar month.
The question is, are these definitions right? Let’s look at each one.