Taking us through the surreal wonder and beauty of his first spacewalk, the tragedy of losing friends in the Columbia shuttle accident, and the development of his enduring love for the Hubble Telescope - which he and his fellow astronauts were tasked with saving on his final mission - Massimino has written an ode to ...

"Astronaut" is the term commonly used in the United States to refer to individuals who are trained to travel and work in space. "Spaceman" is a more colloquial term that can refer to astronauts or to anyone who travels in space, including cosmonauts (from Russia) and taikonauts (from China).