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- Is it normal for thrusters to “ice up”? 3 answers
When watching the upper stage of the Falcon 9, I noticed this white or blue tuft:
It changes shape a bit as time goes on. That makes me think it is something very light (cotton candy, fiberglass insulation) or it is an accumulation of something, akin to blue ice on an airliner.
Bonus: what is the approximate size of this object?