Edward Teller has been an advocate of a programme to develop, from star wars technology, the capability to deflect a large meteorite which might happen to be on a collision course with the Earth. The meteorite would be intercepted by one or more rockets carrying nuclear warheads which would be exploded to deflect the course of the meteorite by enough for it to miss the Earth. The figure shows the orbits of the Earth and the meteorite on a collision course. The Earth and meteorite are shown at the instant when the warheads explode.