One of the more curious aspects of the tenth flight of SpaceX’s Starship rocket on Tuesday was the striking orange discoloration of the second stage. This could be observed on video taken from a buoy near the landing site as the vehicle made a soft landing in the Indian Ocean.
This color—so different from the silvery skin and black tiles that cover Starship’s upper stage—led to all sorts of speculation. Had heating damaged the stainless steel skin? Had the vehicle’s tiles been shucked off, leaving behind some sort of orange adhesive material? Was this actually NASA’s Space Launch System in disguise?
The answer to this question was rather important, as SpaceX founder Elon Musk had said before this flight that gathering data about the performance of this heat shield was the most important aspect of the mission.
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