"It is with an iron will that they embark on the most daring of all endeavors . . . to meet the shadowy future without fear and conquer the unknown."

– Ferdinand Magellan, circa 1520

The term "astronaut" derives from the Greek words meaning "space sailor," and refers to all who have been launched as crew members aboard NASA spacecraft bound for orbit and beyond. Since the inception of NASA's human space flight program, we have also maintained the term "astronaut" as the title for those selected to join the NASA corps of astronauts who make "space sailing" their career profession. The term "cosmonaut" refers to those space sailors who are members of the Russian space program.

The crew assignments and duties of commander, pilot or mission specialist are given to crew members aboard the space shuttle. A special category of astronauts typically titled "payload specialist" refers to individuals selected and trained by commercial or research organizations for flights of a specific payload on a space flight mission. At the present time, these payload specialists may be cosmonauts or astronauts designated by the international partners, individuals selected by the research community, or a company or consortia flying a commercial payload aboard the shuttle.

The links to the left will direct you to biographical information on all of the past and present shuttle crew members. These biographies are prepared by the Astronaut Office of the Johnson Space Center and are provided through the Internet as a public service to the World Wide Web community.

The biographical information contained in this feature is the latest version available from NASA. Updates must be sought directly from the crew members.