Blood Moon eclipse occurs when the Full Moon enters the Earth’s darkest shadow and takes on a deep red hue. When you see the moon low in the sky, the extra air between you and the moon makes the moon look reddish. Voila. Blood Moon. A Blood Moon Actually Holds A Lot Of Spiritual Significance. A “blood moon” is essentially a poetic name for what’s technically called a “total lunar eclipse” that occurs during a super moon.