当人们在积极消除和利用地球上的城市固体废弃物时,伴随着空间技术飞速发展而产生的宇宙垃圾又正在构成对卫星、太空站和宇航员的威胁。宇宙垃圾是指在太空中废弃的人造卫星及发射卫星时各种物体的碎片。自1957年苏联发射第一颗人造卫星以来,进入太空的各种物件就有18000余件,总重量为2000吨, As people actively eliminate and utilize solid waste from the earth on the planet, the cosmic rubbish accompanying the rapid development of space technology is posing a threat to satellites, space stations and astronauts. Cosmic garbage refers to the abandoned satellites in space and the fragments of various objects when launching satellites. Since the first satellite was launched by the Soviet Union in 1957, more than 18,000 objects have been put into space with a total weight of 2,000 tons.