报道称，多年来，太空垃圾一直都是国际空间机构关心的问题，美国航天局考虑了多种选择方案跟踪、探测和移除人造碎片。
The report claimed that for years, space debris has always been a matter of concern for international space agencies. NASA has considered many alternative plans to track, probe and remove human made debris.