Halley's Comet: Once in a Lifetime - S13.E1
NOVA observes worldwide preparations as amateur comet hunters, astronomers and scientists armed with specialized cameras, high powered telescopes and spacecraft look to the heavens in search of the expected arrival in 1986 of Halley's Comet.
Halley's Comet: Once in a Lifetime - S13.E1
January 21, 1986
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