Re: Space...
You're mixing 0g with Newtonian physics. 0g simply means you can't fall. If you cut the engines, you should just stay in place. Newtonian physics allows you to turn around without changing direction, which star wars definitely didn't have (otherwise the x-wings would have gone down the trench backwards, shooting the TIEs). In Newtonian Physics, if you cut your engines, you'll keep moving at a constant speed, until you thrust in the opposite direction.
If I should die, think only this of me:
That in some corner of a foreign field
There lies a plagiarist.