Astronaut Dafydd (Dave) R. Williams, a mission specialist representing the Canadian Space Agency (CSA), is a test subject for the Sleep Studies experiment in the Neurolab aboard the Earth-orbiting Space Shuttle Columbia. The sleep cap monitors and measures electrical impulses from the brain, muscles, eyes, and heart. The photo was taken with an electronic still camera (ESC) at 04:19:00 GMT, April 21, 1998.
Information
Taken in
Space
Author
NASA
Description
Astronaut Dafydd (Dave) R. Williams, a mission specialist representing the Canadian Space Agency (CSA), is a test subject for the Sleep Studies experiment in the Neurolab aboard the Earth-orbiting Space Shuttle Columbia. The sleep cap monitors and measures electrical impulses from the brain, muscles, eyes, and heart. The photo was taken with an electronic still camera (ESC) at 04:19:00 GMT, April 21, 1998.