NASA Astronaut Don Pettit Soyuz MS-26 Launch

Pettit's first trip to the orbiting laboratory was in 2002, where he served as the NASA Science Officer aboard the station as part of Expedition 6. Pettit later traveled to the station aboard space shuttle Endeavour on STS-126, and most recently went to space in 2011. Pettit has a Ph.D. in chemical engineering from the University of Arizona.