Most scientists agree that using nuclear explosives to deflect an incoming asteroid is a bad idea. But Astrophysicist David Dearborn from Lawrence Livermore National Laboratory has been heating up the debate with his theories about how nuclear explosives could be used effectively to nudge an asteroid into a new orbit that causes it to miss the Earth entirely.
Everyone knows that eight planets orbit the Sun. But thousands of other objects, including icy comets and football field-sized asteroids, are also zooming around our solar system. And some of them could be on a collision course with Earth. QUEST explores how these Near Earth Objects are being tracked and what scientists are saying should be done to prevent a deadly impact.