As NASA celebrates its 50th birthday, we celebrate the accomplishments of some of the women astronauts who've come (and gone) so far. Read about these women and see photos of them in action.
Commander Peggy Whitson (right), cosmonaut Yuri I. Malenchenko (center), and Malaysian spaceflight participant Sheikh Muszaphar Shukor demonstrate international cooperation on the space station in October 2007. With her two six-month tours on the station, Whitson has spent more time in space than any U.S. astronaut.
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