Gravity in space?!?! Umm... as with all things moving in space, something must either push it or pull it. Missles and torpedos would act like those today in Earth's atmosphere, a small rocket propells them thru the air, the little fins on the back of the missle control its direction. In space, instead of fins, the nozzle of the small rocket engine moves up/down/ left/right to control direction. Bombs would also have small rockets or thrusters to move them thru space. Zero G is zero G. The only time you have gravity in space is either artificially produced or a rotating platform at such a rate that it produces gravity on its surface in the direction of rotation, and on the opposite ends of the rotation. Dropping bombs in space, no such thing. Fireing bombs in space, that is possible, like fireing a rocket in space.
RFB