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太空碎片是指人类遗留在空间的废弃物,可以说,各类航天器除了返回式卫星、飞船等可回收外,其他类型的航天器在其完成使命、丧失功能之后,便变成垃圾了。于是,那些“太空游客”便几年、几十年,甚至数百年地留在太空。有的会在其自然下落的过程中,与大气摩擦解体、消失,个体比较大的在下落过程中无法烧尽,便落到地面。能落到地面的空间碎片毕竟是少数,绝大多数仍留在太空中,它们不规则地飞行和分布,对人类航
Space debris refers to the waste left by human beings in space. It can be said that all types of spacecraft, besides return satellites and spacecrafts, can be recycled. After other types of spacecraft complete their missions and lose their functions, they become rubbish. As a result, those “space tourists” stayed in space for years, decades, and even centuries. Some of them will disintegrate and disappear with the atmosphere in the process of their natural fall. Individuals will not burn out when they fall, and they will fall to the ground. The space debris that can fall to the ground is after all a minority, the vast majority remain in space, and they fly and distribute irregularly, to humans.