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Crash Course Astronomy Season 1 Episode 3 Cycles in the Sky 2015

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.

  • Released: 2015-01-29
  • Runtime: 12 minutes
  • Genre: Documentary
  • Stars: Phil Plait
  • Director: Phil Plait
Download : MKV
Download : MP4

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