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Horizon: Specials

Special 16 A Close Encouter of the Second Kind
TV-PG

  • 1992-07-10T20:00:00Z on BBC Two
  • 1h
  • United Kingdom
  • English
  • Documentary
This Horizon special program explores what happened when the "Giotto" explorer spacecraft passed within 100 kilometres of Halley's Comet.
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