Lunar eclipses are always interesting, though the "blood moon" is a much rarer event. Instead of a total eclipse, the moon is bathed in a red-orange hue of refracted light coming from around Earth.
With tonight's impending blood moon eclipse (the first of four over the next 18 months or so), many people are discussing its cosmic significance; some are even suggesting that it may be a sign from God such as a portent of the apocalypse. As an ABC News story notes, "for some it signals a certain foreboding. ‘Something is about to change,' Pastor John Hagee of the Cornerstone Church in San Antonio, Texas, writes in his newest book on the four blood moons. Because many biblical references cite the celestial bodies, Hagee says, ‘God uses the sun, moon and stars to send signals to us on the earth.'"
PHOTOS: Lunar Phases: The Changing Face of the Moon
Among the more alarming Biblical verses referring to the moon can be found in Joel 2:30: "And I will show wonders in the heavens and in the earth:
Blood and fire and pillars of smoke. The sun shall be turned into darkness. And the moon into blood,
Before the coming of the great and awesome day of the Lord" (KJV). Pretty heady stuff, though the moon has turned "into blood" several times before, and nothing apocalyptic happened.