Introduction: Lunar eclipse spiritual meaning. A lunar eclipse occurs when the Moon orbits in the Earth’s shadow. In a solar eclipse, the darkest part of the Earth’s shadow is called the umbra, with the lighter part called the penumbra.
During a lunar eclipse, the spectrum of light from Earth is blocked toward the moon, and only a red wavelength passes through, causing the moon to glow a reddish-orange. That’s why lunar eclipses are occasionally called “blood moons.”
