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Flight of the Falcon

机译：猎鹰飞行

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On its second touchdown, Japan's Hayabusa appears to have succeeded in collecting samples from the surface of the asteroid Itokawa, but the weakened spacecraft will have problems returning them to Earth. A faulty valve in the spacecraft's reaction control system (RCS) positioning gas jets may have caused a leak that the JAXA mission control team was still trying to isolate late last week after Hayabusa pulled away from Itokawa. That emergency is doubly troubling. Mission control needs the RCS to point the spacecraft toward home for the two-year trip that is to result in a parachute drop of the asteroid samples. The RCS also is needed for course corrections during the return trip. (The spacecraft's ion electric propulsion system has a separate fuel system.)
机译：在第二次着陆时，日本的Hay鸟似乎已经成功地从小行星丝川的表面上收集了样本，但是被削弱的航天器将存在返回地球的问题。上周下半年在Hay鸟撤离丝川后，JAXA任务控制小组仍在设法隔离泄漏，原因是航天飞机反应控制系统（RCS）定位气体喷嘴的阀门故障可能导致泄漏。这种紧急情况令人倍感困扰。任务控制需要RCS将飞船指向家中进行为期两年的旅行，这将导致小行星样本的降落伞掉落。还需要RCS来回程时进行航向校正。 （航天器的离子电推进系统具有独立的燃料系统。）

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