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Last updated on May 22, 2013 at 21:45 EDT
SOFIA
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SOFIA

January 4, 2013
The rear fuselage of the Stratospheric Observatory for Infrared Astronomy's 747SP is illuminated during telescope testing operations in preparation for aircraft and science checkout flights. The telescope cavity door is open with the lower flexible door partially extended. September 24, 2009 NASA Photo / Tom Tschida