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Japanese scientists are preparing to launch a satellite that will use a 300-meter electromagnetic tether to snag orbiting trash left over from past satellites and space missions. The magnetic field will slow the trash, causing it to gradually fall closer to Earth and eventually burn up in the atmosphere. It's thought there are tens of millions of trash fragments in orbit around the Earth.

ESA's Clean Space initiative is looking at developing a satellite that can rendezvous with space debris and render it harmless by netting it like fish. According to ESA, there are 17,000 trackable objects larger than a coffee cup orbiting the Earth and many more down to the size of paint chips. This may not seem like anything very dangerous, but at orbital velocity, even a paint chip can hit like a bullet and a steel nut has the impact of a hand grenade.