This interview was conducted as part of the background research for David DeVorkin's biography of George Carruthers. This is a focused interview with George “Pinky” Nelson, an astronaut trained in physics and astronomy who flew three times on the space shuttle between 1978 and 1989. The interview covers his selection as a mission specialist astronaut and his experiences going through the selection process. It also covers his specific astronomical interests in solar physics and how his general interests in the space sciences, as well as a personal interest in flying, led him to apply to be an astronaut. The main body of the interview relates to Nelson’s description of the selection process, and his contacts with Naval Research Laboratory astronomer George Carruthers, who applied to be an astronaut in the same group as Nelson but was not chosen.