So-called "blue moon" Tues night comes every three years

3:42 pm
Wed August 21, 2013

So-called "blue moon" Tues night comes every three years

Lead in text: 
A blue moon usually just means the second full moon in a month, but the National Atmospheric Oceanic Administration says this type of moon only comes around once every three years.
The moon rises over the New York skyline in its full stage under a phenomenon called the blue moon, as seen from West Orange, N.J., on Tuesday.