Yes, that is all true. Star Wars is a sci-fi series though so let's consider an existence of technology we don't yet possess: anti-gravity. Today's real life spacecraft needs to be put into orbit to stay in space. In other words, it needs to constantly move fast enough not to fall. That's because big celestial bodies such as, say, the Earth, have gravity. But what if we had some kind of a powerful, yet small anti-gravity device that would fit onto a fighter spacecraft and would compensate for every kind of gravity it encounters? That way, orbiting would no longer be necessary because celestial bodies such as stars or planets wouldn't pull the spacecraft down. That means you could point your vehicle up, fly it to space in a straight line and just stay there without moving at all. That also means you could make all the maneuvers you want and it would enable you to fly around more or less as you would through air. Well, kinda... if you picked up speed, you couldn't then just point the nose up and change direction in a matter of seconds (unless, of course, the anti-gravity device had the ability to manipulate gravity in such a way to move it like that) ...And that's pretty much how it was depicted in Star Wars. If you pay attention you will notice that before each spaceship flew into space, it just lifted itself up without any thrusters. That implies that all the ships had some kind of anti-gravity devices on them.