The Moon This Weekend Is Only a "Blood Moon" If You're Being StupidTom Scocca9/25/15 3:43pm13922EditPromoteDismissUndismissHideGo to permalinkSunday night (in the Western Hemisphere) the shadow of the the Earth will fall on the face of the full moon, darkening it. This is the uncommon, but not too uncommon, phenomenon called a “lunar eclipse.”