人类首次太空事故 美俄卫星空中相撞

(图为美俄卫星相撞示意图)

美俄卫星在以每秒钟6米的速度在太空运行时相撞。美国科学家们开始研究太空中一些废物垃圾相撞的可能性。一位NASA的官员说，这很幸运，目前这种撞击不常发生。

Scientists are examining the possible impact of some extra-terrestrial trash. It's the result of a collision between Russian and American satellites that slammed into each other while traveling at about 6 miles per second! One NASA official said that with space getting more and more crowded, it's lucky this kind of impact hasn't happened more often.

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