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5 celestial events that only happen once in a lifetime

by JoAnna Wendel
Comet, asteroid, meteorite flying to the planet Earth. Glowing asteroid and tail of a falling comet ...
Shutterstock

Shutterstock

Some celestial events happen often, like partial lunar or solar eclipses, Super Moons, or annual meteor showers.

Shutterstock

But some celestial phenomena occur so rarely that you might only be able to catch them once or twice in your lifetime — if at all.

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