NOVAStaffel 13 Bild hinzufügenFolgennummer1Halley's Comet: Once in a LifetimeOverviewNOVA 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.Air dateJanuary 21, 1986Runtime (min)60