dsinc contributes a link to Neil deGrasse Tyson's short piece in Wired on how we could deal with the very real threat of killer asteroids
, writing "In 2029 we'll be able to know whether, seven years later, Apophis will miss Earth or slam into the Pacific and create a tsunami that will devastate all the coastlines of the Pacific Rim."
From the article: "Saving the planet requires commitment. First we have to catalogue every object whose orbit intersects Earth’s, then task our computers with carrying out the calculations necessary to predict a catastrophic collision hundreds or thousands of orbits into the future. Meanwhile, space missions would have to determine in great detail the structure and chemical composition of killer comets and asteroids."