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The Sky at Night · S16 E6

The Tenth Planet?

1972-05-24

Patrick Moore explains why Planet X has been so difficult to detect, and what kind of place this dim, cold world at the limits of our solar system would be.

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Season 16 Episodes

  • E1The Great Bear
  • E2X-Ray Stars
  • E3Mars - A Dynamic World
  • E4What Do You Want to Know?
  • E5Fifteenth Anniversary
  • E6The Tenth Planet?
  • E7Midsummer and Megaliths
  • E8Jupiter - The Colossal Planet
  • E9The Andromeda Galaxy
  • E10An Exploded Planet?
  • E11Mars
  • E12Collapsing Stars
  • E13Tycho's Star