blood moon
After next week, the awe-inspiring phenomenon will not occur again for about three years.
Sunday's celestial event was the last total lunar eclipse before 2021.
It was quite the celestial treat.
Blood moons have inspired both awe and fear throughout the centuries.
WHAT'S HAPPENING
NASA is calling it a "lunar trifecta."
Weather permitting, the moon will look red—but there's nothing supernatural about that.
It's the first in more than 30 years.