Collins had to pilot the shuttle through a 360 degree flip while flying beneath the International Space Station. It allowed colleagues on the orbiting lab to photograph the craft's underside and check if the heatshield had been breached.
Source: Computational Materials Science, Volume 267
。关于这个话题，同城约会提供了深入分析
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Working with Prof John Plane at the University of Leeds, they detected that the amount of lithium in the atmosphere at around 100km above Earth increased by a factor of 10.