what is a blue moon and how often does it happen?

Question

what is a blue moon and how often does it happen?

In: Physics

Answer 1

There are two definitions. The “real” definition is when there are four full moons in a single season (spring, summer, etc.). The more common definition, though, is when there are two full moons in the same calendar month, as there are this month (Oct 1 and Oct 31). It happens every couple of years.

The moon does not actually turn blue.