> Wouldn't we be better off making sure we can reliably find them first? People are already are working on that. For example, there's the NEOWISE project[0], w

> Wouldn't we be better off making sure we can reliably find them first? People are already are working on that. For example, there's the NEOWISE project[0], which used the Wide-field Infrared Survey Explorer to look for potentially dangerous astroids. And there is a ongoing effort for a new space mission, NEOCAM[1], specifically designed to do this same thing and find more objects. [0] http://neo.jpl.nasa.gov/programs/neowise.html http://neo.jpl.nasa.gov/programs/neowise.html [1] https://en.wikipedia.org/wiki/Near-Earth_Object_Camera https://en.wikipedia.org/wiki/Near-Earth_Object_Camera