See also: Ed Lu's excellent Long Now seminar. http://longnow.org/seminars/02013/jun/18/anthropocene-astronomy-thwarting-dangerous-asteroids-begins-finding-them/

See also: Ed Lu's excellent Long Now seminar. http://longnow.org/seminars/02013/jun/18/anthropocene-astronomy-thwarting-dangerous-asteroids-begins-finding-them/ http://longnow.org/seminars/02013/jun/18/anthropocene-astron... Short version: Stopping an asteroid is more about early detection than anything else.