Retired NASA astronaut Peggy Whitson
was born on February 9, 1960 in Mount Ayr, Iowa.
She earned a Ph.D in biochemistry from Rice University in Texas. Before becoming an astronaut candidate, she had worked as a research biochemist. During her time with NASA, she spent more time in space than any other NASA astronaut. (Her record is still unbroken.) Among all astronauts - and cosmonauts! - she has the record for the number of spacewalks by a woman and is fifth overall for time spent on EVAs. Whitson was also the first woman commander of the International Space Station (ISS).
Not all of her work with NASA was in space. She spent a few years as Chief Astronaut. Whitson was not only the first woman to hold this position, but also the first appointee who was not a pilot.