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Watch Horizon Season 41 Episode 16 Online

  • 7.328/10
  • COUNTRIES: United Kingdom
  • Subtitles: English

In 1610, Galileo used a new invention -- a simple telescope -- to look at Saturn. When he viewed the planet for the first time, he saw something strange. He thought he saw three stars together, a big one in the middle of two little stars. He knew they weren't really stars, but what were they?