10. There is no sound in space (rumbling engines, electronic beeping, laser blasts, etc.)
You’ve probably heard this fact stated before by your high school science teacher or some killjoy walking out of a movie theater: If movies were trying to be scientifically accurate, there would be absolutely no sound out in space. That means no booster rockets rumbling, no laser blasts during an epic space battle; just pure silence. Space, by it’s very definition, is made up of absolutely nothing. Since sound is caused by vibrations through a medium — air, water, etc. — there’s simply no way for sound to transmit over any distance. Of course, watching almost any action scene from Star Wars with the mute button on would be incredibly boring, so filmmakers usually get a pass for this one.