Expedition 25 Commander Doug Wheelock and Flight Engineers Shannon Walker and Scott Kelly worked with the Sleep-Wake Actigraphy and Light Exposure during Spaceflight, or SLEEP, experiment Friday. SLEEP examines the effects of space flight and ambient light exposure on the sleep-wake cycles of the crew members during their stays on the International Space Station.
Mission Control informed the station crew that shuttle managers had scrubbed Discovery?s launch attempt for Friday due to a hydr [...]
Full story at http://spacefellowship.com/news/art23676/science-maintenance-spacewalk-preparations-for-station-crew.html
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