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国际空间站元件故障 宇航员紧急出舱两小时修复

2017-05-24 05:51:29   央视网

当地时间5月23日上午,美国航空航天局(NASA)称,国际空间站的一个数据继电器于上周六(20日)发生故障。由于该部件控制着空间站的散热器,太阳能电池板,和冷却循环系统等重要部件,因此命令两名宇航员进行了紧急修复。

图片来自NASA

​5月23日上午,美国航空航天局女指挥官惠特森和工程师费舍尔对发生故障的元件进行了更换。为了此次紧急任务,两名宇航员不得不进行了一次计划外的长时间太空行走,行走总计时长超过了两小时。对此美国航空航天局称,此次故障不会对任何宇航员的安全造成威胁,因为在故障元件停止工作后,备用元件将自动取而代之。

但《华盛顿邮报》等媒体质疑称,美国航空航天局是在刻意轻描淡写宇航员出舱维修的危险性。在 2013 年,宇航员卢卡·帕米塔诺在进行一次出舱维修时,宇航服出现问题,导致头盔内进水严重,险些窒息身亡,这也成为了美国宇航局太空行走史上最为惊险的一次死里逃生。自此事件之后,宇航员因维修而进行太空行走的必要性饱受争议,但美国航空航天局在近年来依然多次要求宇航员对于一些非重大故障进行出舱维修。

据悉,此次发生故障的元件需要地面团队进行研究才能确定故障原因,6月1日,故障元件将被太空探索技术公司(SpaceX)的货运飞船带回地球。(央视记者 贾犁)

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