不久前召开的空间科学大会提出,为避免给人造卫星带来灾难性后果,各国必须立即着手采取行动清除太空垃圾。统计显示,地球轨道上有2.3万个直径大于10厘米的垃圾物体,此外还有几十万个直径在1至10厘米之间的物体。太空垃圾主要来自废弃的多级运载火箭、失败的发射、废弃或者坏掉的卫星,是半个多世纪以来人类探索太空的产物。太 The recent space science conference proposed that in order to avoid catastrophic consequences for satellites, all countries must immediately take the initiative to eliminate space debris. Statistics show that there are 23,000 garbage objects in Earth’s orbit larger than 10 cm in diameter, in addition to hundreds of thousands of objects between 1 and 10 cm in diameter. Space junk is mainly from abandoned multi-stage launch vehicles, failed launches, abandoned or broken satellites, the product of space exploration by mankind for more than half a century. too