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List of human spaceflights : ウィキペディア英語版 | List of human spaceflights
These chronological lists include all crewed spaceflights that reached an altitude of at least 100 km (the FAI definition of spaceflight, see Kármán line), or were launched with that intention but failed. The USA has adopted a slightly different definition of spaceflight, requiring an altitude of only . During the 1960s, 13 flights of the US X-15 rocket plane met the US criteria, but only two met the FAI's. These lists include only the latter two flights; see the list of highest X-15 flights for all 13. , there have been 301 manned spaceflights that reached 100 km or more in altitude (303 including two failed attempts), 8 of which were sub-orbital spaceflights. ==Summary==
*Includes the two unsuccessful launches of STS-51-L and Soyuz T-10-1.
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