"Satellites in orbit around the Earth are at risk of collision with space-based objects, which have either been discarded by space missions or created in satellite collisions. But now a team of researchers at NASA believes it may have found a relatively cheap solution for dealing with this "space junk" – aim a medium-powered laser into space and nudge any objects on a collision course out of harm's way."
Laser beam could nudge space junk away - physicsworld.com
