【精益通时事快讯】天宫一号再入大气层烧毁！天宫一号再入大气层烧毁

Tiangong-1

原文

In terms of size, Tiangong-1 is only the 50th largest spacecraft to come down, and there have been no recorded deaths or injuries from people being struck by debris from any of them.

However, a highly toxic and corrosive substance called hydrazine, which is often used in creating potent rocket fuel, can potentially survive re-entry.

"For your safety, do not touch any debris you may find on the ground or inhale vapors it may emit," an online statement released by the space agency said.

It was launched unmanned but was designed to be habitable, to test docking with other craft, and to be used for conducting experiments.

Tiangong I had completed six space rendezvous and docking missions with three visiting spacecraft. The first visit was by an unmanned spacecraft called Shenzhou VIII in November 2011, as part of China"s first space docking mission.

The second and third missions were both manned: Shenzhou IX in June 2012 and Shenzhou X in June 2013. Both manned missions had three astronauts and lasted about two weeks, during which the astronauts tested the station"s various systems and living conditions.

译文

在烧毁的航天器里面，天宫一号的体积仅排在第50位，而此前没有任何记录显示有人被烧毁的航天器碎片击中并导致伤亡。

然而，坠落过程中可能有一种名为联氨的剧毒腐蚀性物质会残留在碎片上，这种物质常被用来制造火箭推进剂。

国家航天局发布的网上公告称：“为了安全起见，请不要触碰地上的航天器碎片，也不要吸入碎片散发的气体。”

天宫一号发射的时候没有载人，但是设计初衷是可载人的，用来测试与其他飞船对接并进行一系列实验。

天宫一号已经完成了6次空间交会，并和3艘飞船实现了对接。第一次对接是在2011年11月与神舟八号无人飞船对接，这也是中国首次太空对接任务的一部分。

第二次和第三次对接任务都是载人交会对接任务，分别是在2012年6月与神舟九号对接，以及在2013年6月与神舟十号对接。两次载人航天任务都有三名宇航员，时间持续约两周，在这期间航天员测试了空间站的各个系统和生存条件。

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