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am_Unition  ·  69 days ago  ·  link  ·    ·  parent  ·  post: New Pictures from Juno's Closest Flyby of Jupiter's Great Red Spot

Yup. It turns out no one thought about vacuum degradation of the material used in the moving parts making up the thruster valves. And it was a five year trip to Jupiter in the hardest of hard vacuums.