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Loading contentAlso known as STS, Space Transportation System
NASA's partially reusable crewed launch system — a winged orbiter with an external tank and two solid rocket boosters — that flew 135 missions building the ISS and servicing Hubble.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.