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. [ ] although the term is generally reserved for professional space travelers, it is sometimes applied to anyone who travels into space, including scientists, politicians, journalists, and tourists. until , professional space travelers were sponsored and trained exclusively by governments, either by
the military or by civilian space agencies. however, with the launch of the privately funded spaceshipone in , a new category of astronaut was created: the commercial astronaut. with the rise of space tourism , nasa and the russian federal space agency agreed to use the term "spaceflight participant...
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