Day9 A satellite that was carried to space aborad the shuttle Discovery 20 years ago is about to fall to earth, but nobody knows where did the debris will hit.

一颗在20年前被探险者号运到太空的人造卫星将要坠落到地球上，但是没有人知道碎片将落在哪儿。satellite人造卫星shuttle航天飞机，梭子debris碎片，残骸。