An important technological secret of the Stellar Empire, Tractor and Repulsor Beams are used to either pull or push mass without any physical contact, often at large ranges and stupendous scales. The mechanism somehow involves Hyperwave and Gravitic Physics. In a more mundane form, we know it from commonly available Lifters. We're quite sure that with enough base knowledge, we'll be able to replicate this technology for our own, nefarious needs.