Answer:
Ang buwan ng dugo/blood moon na ito ay nangyayari sa panahon ng isang buong eclipse ng buwan.
During the total phase of a lunar eclipse, our atmosphere acts like a lens, bending or refracting some of the reddish colors seen at sunrise and sunset into the Earth's shadow. When those colors fall on the moon, our natural satellite appears to glow with a ruddy color, hence the reference to blood.
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