Thousands of objects, including comets and asteroids, are zooming around our solar system; some could be on a collision course with Earth. This video explores how these Near Earth Objects are being tracked and what scientists are saying should be done to prevent a deadly impact.
There are three categories of actions that humans could take to keep an asteroid from hitting Earth. None is very practical.
Explains how NASA plans to capture an asteroid and put it into orbit around the moon for study.