Stock Photo - Astronauts Daniel W. Bursch (left) and Steven L. Smith juggle the supportive gear for one of the flight's 15 Detailed Supplementary Objectives (DSO). The instruments support DSO 484 for the assessment of circadian shifting in astronauts by bright light. The two mission specialists were joined by four other NASA astronauts for eleven days aboard the Space Shuttle Endeavour in Earth orbit, in support of the Space Radar Laboratory-2 (SRL-2) mission.

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