Can you pass this 1980s quiz?
1980s
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The arrival of which comet in 1986 was met by a series of American, Soviet, Japanese, and ESA probes?
Comet Kohoutek Borrelly's Comet Halley's Comet Comet Encke
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1960s
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This astronaut became the first American to orbit the earth in 1962.
1980s
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Which planets did Voyager 2 reach in the 1980s?