a blood moon is popularly used to describe a total lunar eclipse, when earth casts its shadow on a full moon & eclipses it, the moon can get a red glow + a total lunar eclipse is when earth eclipses a full moon
Blood Red Moon April The bloody red color the moon takes on during an eclipse is caused by refraction of sunlight by the Earth's atmosphere. 2014 red moon begins a rare sequence of four total lunar eclipses expected over the next two years!
This would be an awesome tattoo. Montana Moon: Photographer John Ashley created this striking mosaic of the blood moon phases of the total lunar eclipse on April 2014 from Kila in northwestern Montana.