The term "astronaut" derives from the Greek words meaning "space sailor," and refers to all who have been launched as crew members aboard a spacecraft bound for orbit and beyond. Since the inception of a human space flight program, we have also maintained the term "astronaut" as the title for those selected to join the 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.