Asteroid Warning System Advocated by Scientist...

A Week's Warning of Asteroid Strike Would Be Simple, Scientist Says
By Charles Q. Choi
SPACE.com Contributorposted: 03 December 2010
09:23 am ET

An early warning system that could give Earth a week's notice or more before a space rock destroyed a city would cost only $1 million per observatory, its leading proponent suggests. Given current technologies, this lead time would not be enough to mount a mission to deflect the incoming object, but...(more)...