Quantcast
Last updated on April 21, 2014 at 12:45 EDT
STS090-E-5085
44 of 114

STS090-E-5085

June 7, 2011
Payload specialist Jay C. Buckey, Jr. (right) helps astronaut Richard M. Linnehan with a sleep cap. The cap monitors and measures electrical impulses from the brain, muscles, eyes, and heart as part of a study of astronaut sleep patterns in space.