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Canadian astronaut Bob Thirsk

Canadian astronaut Bob Thirsk undergoes a BISE (Bodies in the Space Environment) session. The purpose of the Canadian experiment, developed by York University, is to find out how astronauts determine up from down in a weightless environment. (Credit: NASA)

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File size: 2.49 MB
Image size: 2400 x 1921 pixels
Resolution: 300 dpi


Image date: July 14, 2009

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