Season 2 Episodes15
Cast1

Michael J. Massimino
Narrator (voice)
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Astronaut Mike Massimino reveals the alien secrets of comets, strange visitors from deep space that might be responsible for life on Earth.

Michael J. Massimino
Narrator (voice)
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"Comets: Mysteries from the Deep" is episode 8 of The Planets and Beyond season 2. It aired on August 7, 2018.