航天飞机轨道器
航天飞机轨道器是NASA的航天飞机计划下的宇宙飞船。 每个轨道器既是可重用的空天飞机，火箭，太空船，也是飞机。轨道器可将乘员和载荷送往地球轨道，进入在轨运行，并重返大气层，最后滑翔降落，将乘员和某些载荷送回地球。
除了乘员和载荷，轨道器最重部分是推进系统。但三台主发动机的推进剂来自外部不可重用的外储箱，两台固体助推器在上升段前两分钟内提供辅助推力。
Space Shuttle orbiter
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Space Shuttle orbiter 航天飞机轨道器
The Space Shuttle orbiter was the reusable spaceplane component of the Space Shuttle program. Operated by NASA, the U.S. space agency, this vehicle could carry astronauts and payloads into low Earth orbit, perform in-space operations, then re-enter the atmosphere and land as a glider, returning its crew and any on-board payload to the Earth.
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