Commercial astronaut Commercial astronaut A commercial astronaut is a person trained to command, pilot, or serve as a crew member of a privately funded spacecraft. This is distinct from an otherwise non-government astronaut, for example Charlie Walker, who flies while representing a non-government corporation but with funding and/or training coming from government sources. The definition of “astronaut” and the criteria for determining who has achieved human spaceflight vary. The FAI defines spaceflight as any flight over of altitude. In the United States, professional, military, and commercial astronauts who travel above an altitude of are eligible to be awarded astronaut wings. Until 2003,
Astronaut training the ISS. The Tsukuba Space Center also includes medical facilities for assessing suitability of candidates, an isolation chamber for simulating some of the mental and emotional stressors of long duration spaceflight, and a hypobaric chamber for training in hull breach or Life Support System failure scenarios resulting in a reduction or loss of air pressure. Although official detail of the selection process for the Shenzhou program is not available, what is known is that candidates are chosen by the Chinese National Space Administration from the Chinese air force and must be between 25 and 30 years of age, with a