Retired astronaut Jerry Carr was commander of Skylab 4 from November 1973 to February 1974 and logged more than 2,000 hours in space. In a recent TED Lesson, Carr shared his experience as a NASA astronaut, from training up until he was assigned to Skylab. It touches on the parts of astronaut life that don't happen in space���the training, the waiting, and the disappointment in having a mission canceled. But it's still riveting, especially accompanied by Sharon Colman Graham's animation.

[TED-Ed via Geekosystem]