Space debris, also known as space junk, is the waste of human space activities and the main source of pollution of space environment. With the increasing frequency of space activities, space debris is increasing day by day, which poses a serious threat to spacecraft in near-Earth space. In addition, the fall of space debris into the atmosphere will pose a serious threat to the safety of life and property on the ground, especially when the nuclear-powered spacecraft falls, it will cause chemical and radioactive pollution to the environment, and the consequences will be especially serious.
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Space debris is the main pollution source of space environment.