Astronaut Peggy Whitson Sets New NASA Record For Most Days In Space
Nearly 15 years after her first space launch, NASA astronaut Peggy Whitson has now spent more time off-planet than any other American, at more than 534 days. Whitson, 57, is a biochemist who has twice commanded the International Space Station. "It is one of those rides that you hope never ends," Whitson tweeted last night. "I am so grateful for all those who helped me on each of my missions!"