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tian shang de wu ran : tai kong la ji
Author(s): 
Pages: 10
Year: Issue:  1
Journal: Health World

Abstract: 宇宙航天事业的发展,给人类展示了飞出地球的美好前景,但也给宇宙空间带来污染。漂浮在宇宙空间的垃圾被称作“太空垃圾”,它与人造卫星一样,也是按照一定的轨道绕地球运转的。人类发射的火箭散失在太空的碎片以及寿命已尽的卫星残骸等,都是太空垃圾。这些被人类丢弃的人造卫星和火箭的碎片基本处于无人管理而不断增加的状态,数十年来已经有数百
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