It turns out that the sky is full of space debris, which poses a threat to craft and satellites orbiting Earth. A team of scientists at Tsinghua University in Beijing, China have come up with a way to remedy this. They've developed a spacecraft that collects the debris in a wide-cast net and uses it as fuel to propel itself forward. This technically means it could keep cleaning forever, unless an unforeseen event brings its efforts to an untimely end. Lasers have been developed for eliminating larger pieces of space junk, however aren't designed for smaller bits that are harder to locate and track. That's where Lei Lan and her team come into the picture.