I really want to bring this to the attention of almost every Science fiction writer, film script writer and comic book writer. There will not be nor never be spacecraft that will look like boats or planes. Space shuttle a exception that I hope will never be repeated. First think which way the ship goes accelerates. That is the way gravity will go, and if you had long corridors they would suddenly turn into very high ledges. Artificial gravity requires large deposits of handwavium and unobtainium. second space is not freezing cold. It has no temperature and you will actually overheat because it's a amazing insulator. heat is the enemy to any ship in space and when firing weapons you can literally be fired from the heat dump. Third there is no stealth in space. Space is mostly empty so any energy given off in any spectrum shows up like a light in a pitch black room. The most realistic space fighters in film are Babylon 5's starfury. there is no air to turn in so you can just rotate to take out a enemy from behind. I pulled a lot of this from Atomic Rockets which is a invaluable resource for any writer of Sci-fi that requires a spaceship. http://www.projectrho.com/public_html/rocket/index.php There are many things that realistic space travel brings to the table though. Rick's law: anything traveling at 3 km/s has the kinetic energy equivalent to it's weight in TNT. Be it a warhead or a pillow. This goes up exponentially with speed. At close to light speed a slug of steel becomes Even though there isn't stealth in space it's impossible to tell when your enemy is firing a laser at you. Light speed being the fastest anything can go. less than light speed can still move unpredictably which means space battles become like a mixture of weather forecasting, speed chess, and poker.