“行走的炮弹”根据美国航空航天局0DP0统计,到2016年10月4日,地球近地轨道范围内被监测到的人造天体有17817个,而近三个月就增长了88个,碎片增长的速度越来越快,这导致地球看上去就像被垃圾场包围了一样。这些空间碎片绝大多数分布在距地面2000千米,这是人类使用最频繁的低地球轨道,其运行速度为7.8千米/秒,如果它们与航天器发 According to NASA 0DP0 statistics, as of October 4, 2016, there are 17,817 man-made objects detected in the Earth’s near-Earth orbit, an increase of 88 in the past three months, Fragmentation grows faster and faster, which leads to the Earth looking as though it is surrounded by landfills. The vast majority of these debris are distributed over 2,000 kilometers above the ground, the most commonly used low Earth orbit for humans, operating at a speed of 7.8 kilometers per second if they are associated with spacecraft