Hmm.. I'm no physicist or anything, but I think a nuclear explosion would have much less of an effect if used in space then on the surface of a planet, as I thought the primary destructive force of a nuclear blast was its shockwave and not the actual radiation and heat. Since there is no material for the shockwave to propogate through in space, only the radiation (infrared included) of the blast is effective. Considering that most spaceships are probably heavily shielded against heat and radiation (two common dangers in space), I think this nuclear blast would have little effect. Just some theorizing.. Jonathan Rosenfeld (AKA Fwiffo)