在辽阔的太空中,有很多人造航天器围绕着地球运行。有的卫星帮助飞机和轮船确定方位;有的卫星观测气象变化;有的卫星维持四面八方的通讯联络。而太空望远镜、空间轨道站等则日夜不停地探索着宇宙奥秘,进行着科学实验。这些航天器从设计、制造到发射上天,耗费了巨大的人力、物力和财力,运行中哪怕出现一丝一毫的小问题,也会造成难以估量的损失。可是,偏偏有一些捣蛋鬼不时地威胁着它们的运行安全。这些捣蛋鬼,就是令人讨厌又头疼的太空垃圾。 In the vast space, there are many manned spacecraft that operate around the earth. Some satellites help aircraft and ships to determine the location; some satellites observe the weather changes; some satellites maintain communication in all directions. The space telescope, orbital space station, etc. day and night are constantly exploring the mysteries of the universe, the conduct of scientific experiments. These spacecraft from design, manufacture to launch heaven, consuming a huge amount of manpower, material and financial resources, running even minor slightest problem, can also cause incalculable losses. However, some rascals sometimes threaten their operational safety. These rascal, is annoying and headache of space junk.