Hi all, I'm writing myself a science fiction book. I'm also trying to keep the science and the fiction as separate as I can, space is just the setting, I'm focusing on the fiction but would like the science to be possible. So I've been reading a lot of stuff on wikipedia and all over the netscape trying to basically come up with scientific explanations for a lot of the technology that is/will be present in my book. Science and Physics were never my favorite subjects back in the days of the old schoolyard but I am interested in things that are interesting (such as science and physics). As such I understand more than what a lot of people probably do but a lot less than what I need. So I've come here looking for help. I would be highly appreciative of anyone who would be able to correct anything I've got wrong or anyone who could answer any of the questions below. If there's a decent book or excellent website that anyone knows about I would love to know about it. From my understanding of the physics of space, for something to move there needs to be a force greater than its mass to move it. So for example a spaceship that weighted 100kg would need a force of 101kg to move it (please correct me here if needed). This force would come in the form of a rocket or thruster propelling something out of it at the required force. So this means that a larger rocket/thruster would propel the craft faster and a larger craft would need a larger thruster to get it moving at the same rate as a smaller craft with a smaller thruster? If a larger craft requires a larger thrust to get it moving then to travel at the same rate as a smaller craft with a smaller thruster it would need to carry more propellant, meaning it would weigh more meaning it would need a bigger thruster etc etc? Would this mean that a smaller craft will always be able to accelerate faster than a larger craft (using the same thrusters with just size differences)? Ion Drives? They electrocize atoms and then use magnets to shoot them out at high speed creating enough force to propel the craft? Rocket Engines work much the same but it's heated gas that is expelled rather than ions? Fusion power. This is the process of smacking two atoms together to force them to become other atoms with the reaction giving off heat? It's the heat that would be used to generate electricity? Fusion is not proven yet? What is plasma? I know it has something to do with electricity but I've not been able to find much info on it's use in space travel (if even feasible). Thanks for any help.