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30多年的空间飞行活动,往外层空间注入了数千个人造物体,使地球周围的环境发生了很大的变化。空间飞行活动给外层空间环境带来许多不利影响,除了污染之外,最突出的是空间垃圾问题。空间垃圾给运行的卫星带来危险,其碎片落到地球上危害着公共安全,已经构成潜在的严重威胁。据1988年6月30日美国“航宇局卫星形势报告”的资料提供,当时跟踪的在轨空间物体共7184个(见表1),其中至少95%是无用的空间垃圾——不再工作的有效载荷、用过的火箭级、脱落的螺帽和螺栓,以及爆炸碎片。另一份有关空间轨道垃圾的报告也指
More than 30 years of space flight have injected thousands of man-made objects into outer space and have greatly changed the environment around the Earth. Space flight activities have many adverse effects on the outer space environment. Apart from pollution, the most prominent issue is the space debris problem. Space debris poses a danger to the operating satellites, and its debris falling to the ground endangers public safety, posing a potentially serious threat. According to the information provided by the United States NASA Satellite Situation Report dated 30 June 1988, a total of 7,184 orbiting space objects were tracked at the time (see Table 1), of which at least 95% were useless space debris - no longer working Payload, used rocket level, dropped nuts and bolts, and explosive debris. Another report on space orbital garbage also refers