Halley's Comet: Once in a Lifetime

NOVA

21st January 1986 55 mins Season 13 Episode 1

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.

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Season 13 · Episode 2

Goddess of the Earth

Gaia, the Greek word for Earth goddess, also is the name of the controversial hypothesis that life on Earth controls the environment. NOVA explores this provocative theory that challenges conventional ways of thinking about the Earth.

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