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How the Universe Works Season 5 Episode 2 Mystery of Planet 9 2016

8.2/10 by 111 users

Scientists have discovered a mysterious ninth planet on the very edge of our solar system. Ten times the size of Earth, this strange world could have moons with extraterrestrial life.

  • Released: 2016-11-29
  • Runtime: 42 minutes
  • Genre: Documentary
  • Stars:
  • Director:

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