THE SHORT ANSWER (TSA)
No one is exactly sure what a “Blood Moon” is. The term sounds like it must come from ancient mythology or legends, but it doesn’t. Actually, it’s quite new. With the recent lunar eclipse, the term “Blood Moon” suddenly became “all the rage” with everyone describing the eclipse as a “Blood Moon.”
A lunar eclipse is a sudden darkening of the, otherwise, full moon caused by the earth coming between the Sun and the Moon. In other words, the earth casts a shadow on the moon causing it to suddenly “disappear”
But not quite.
Those of us who’ve seen a few lunar eclipses can tell you that the moon never completely disappears during an eclipse. First, a thick, dark grey, smoky-looking shadow creeps over the moon. But just behind the edge of the creeping darkness you can make out a dim, but distinctly visible, round moon. But this darkened moon always has a dark reddish color. So, every eclipse produces a very dim and dark-red moon.
Even though no one has ever called it a “Blood Moon” before, the name is catching on. But, to be accurate, there has been at least one special significance given to the name “Blood Moon.” Two Christian Pastors have pointed to a biblical prophecy in which the appearance of a series of blood-red moons signals the end of time. See: Four Blood Moons: Something Is about to Change