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Shuttle Window Strike - STS-94
The photograph above shows an impact crater
found on Shuttle window #6 from STS-94. The crater is
roughly one millimeter in size, while the
impacting projectile is estimated to be 100 to
150 microns in size. The projectile residue
indicates the chemistry of this object is
aluminum oxide; aluminum oxide particles are
produced during normal thrusting operation of a
solid rocket motor. This impact posed no threat
to the crew, however, the window was subsequently replaced.
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