Abstract
We address the problem of the billiards shot strategy to deflect or destroy a dangerous near Earth Object (NEO) on a collision course with the Earth. The idea is to use a small asteroid to strike the threatening NEO. We show that the energy required to deflect a small asteroid, typically ten times smaller in diameter than the other, is relatively low and that the collision between the two provides enough energy to destroy the larger or to deflect it from its collision course with our planet. A case study has been performed, assuming 1997 XF 11 was the threatening NEO. A candidate asteroid has been identified to have the required orbital parameters for the strike.
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