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NASA’s Unexplained Files • SEASON 4 EPISODE 7

Mystery of the Invisible Planet

NASA’s Unexplained FilesSeason 4Episode 7Oct 11, 201660 min

A probe carrying a message to aliens malfunctions as it enters deep space. A NASA mission goes disastrously wrong when an imposter breaches Mission Control. Astronomers may have found an invisible planet around a distant star.

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