A "Blue Moon" occurs when there are two full moons in one month. We had one on August 2nd and again last night, August 31st.
It's not necessarily blue, but it amazing how bright it was overnight! It seems that though Isaac brought a lot of humidity, the atmosphere was quite "clean".
This picture was taken by Andy Wallingsworth of Old Hickory, TN. Andy said he snapped it right after giving a wink to Neil Armstrong.
The next time we have two in one month will be July 2015.