Full Moon, New Moon, Blue Moon, Black Moon?
Everyone knows what a full moon and new moon (no moon visible) are.But how about a Blue Moon?
A Blue Moon is 2 full moons within the same month. It happens once or even twice a year. More than the “once in a blue moon” phase (meaning a rarity) would lead you to believe. Strangely enough there aren’t any this year. Last one was Dec 31, 2009. The next is Aug 31, 2012.
and a Black Moon?
A Black Moon is two new moons in the same calendar month. Consider to be lucky by some. Last was August 30, 2008. The next Black Moon will be on July 30, 2011.
Check out this site for more information on phases of the moon: http://aa.usno.navy.mil/data/docs/MoonPhase.php