Where do we find the material strong enough yet lightweight enough to act as a cable or track?
我们在哪里可以找到足够坚固且足够轻的材料来充当电缆或轨道呢？
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There are now about 22, 000 pieces of material in orbit that are big enough to track from the ground, and many more too small to track but also capable of damaging working satellites.
As Skinner raps in "Let's Push Things Forward," a track from "Original Pirate Material," his debut album: "Let's put on our classics and have a little dance, shall we?"