Take This Once-in-a-Lifetime Quiz on Rare Events
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DEA / BIBLIOTECA AMBROSIANA/ De Agostini via Getty Images
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Which celestial object is only visible once every 76 years?
Oops! Incorrect.
SaturnSaturn
2%Halley’s CometHalley’s Comet
96%CeresCeres
1%EuropaEuropa
1%