Why lunar eclipses turn the moon blood red
When Earth's shadow engulfs the Moon during a total lunar eclipse, our atmosphere filters sunlight, painting the Moon a striking, dramatic blood-red hue.
During a total lunar eclipse, the full moon dramatically transforms into a blood-red orb. This happens when the moon passes into Earth's shadow, blocking direct sunlight. Our atmosphere acts like a lens, bending sunlight and scattering away blue light, leaving only the longer red wavelengths to illuminate the moon's surface.
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