Hi, First of all I'm sorry for choosing the "general physics" forum, but I didn't find anything better suited. I have been watching Star Trek and other Science-Fiction series and I am interested in how you would, in theory, make spacecrafts navigate in space. Most SciFi Spacecraft designs tend to have one or more engines pointing backwards, which propell the craft forward. Rockets that we fire into space also mostly need to focus on the forward movement. What I haven't found so far though is how the "enterprise" could move to the right or left, or turn. Aircraft-Flaps aren't the answer, so what is? A spacecraft, once launched, would (theoretically) not slow down in space. So even slowing down would need an engine in the front, pointing in the opposite direction to the engine at the back of the craft. Then why do almost all spacecrafts that artists design for movies and games only have forward engines? Is it simply style? Or is there other ways of turning an object in space?