Chris Austin Hadfield OC OOnt MSC CD (born August 29, 1959) is a Canadian retired astronaut, engineer, singer, and fighter pilot. The first Canadian to perform extravehicular activity in space, Hadfield has flown two Space Shuttle missions and served as commander of the International Space Station (ISS). Prior to his career as an astronaut, Hadfield served in the Canadian Forces for 25 years as an Air Command fighter pilot.
An astronaut (or cosmonaut) is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft.
Although generally reserved for professional space travelers, the terms are sometimes applied to anyone who travels into space, including scientists, politicians, journalists, and tourists.