Halley’s Comet appears once in ___years.
a) 85
b) 70
c) 90
d) 120
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1
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Halley’s Comet appears once in 76 years.
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hello !
75
It is a "periodic" comet and returns to Earth's vicinity about every 75 years, making it possible for a human to see it twice in his or her lifetime. The last time it was here was in 1986, and it is projected to return in 2061
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