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Source: Space Demographics compiled by William Harwood with days in space from
Mark Wade's Encyclopedia Astronautica, and NASA.
Notes:
- Days in space exclude ongoing missions and are rounded off.
- Because the Space Shuttle Challenger was lost before reaching orbit on
January 28, 1986, STS-51L is not counted for the veteran crew members,
and the three rookie crew members of the STS-51L mission are not included
in this list.
- 451 people have flown in orbit, following the launch of STS-115. (Joseph Engle
flew three X-15 flights over 80 km in addition to two Space Shuttle missions)
- Under the United States Air Force (USAF) definition (over 80 km altitude):
460 (Seven additional X-15 pilots, including Joseph Walker, flew the X-15
above 80 km. Mike Melvill and Brian Binnie flew SpaceShipOne (SS1) over
100 km three times.)
- Under the Fédération Aéronautique Internationale (FAI)
definition (over 100 km altitude): 454 (One of the X-15 pilots, Joseph Walker, flew two X-15 flights over 100
km. Mike Melvill and Brian Binnie flew SpaceShipOne over 100 km three times.)
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