full moon 2013

As EarthSky explains: Skywatchers, get ready for a special sight tonight: with the autumnal equinox set to fall on Sept. 22
This month's full moon, which rises on Tuesday (Aug. 20), is not just a Blue Moon — it's also the Full Sturgeon Moon, the Full Red Moon, the Green Corn Moon and the Grain Moon.
Today's full moon qualifies as a Blue Moon because it's the third full moon in a season with four (most seasons have only