propulsion in space. how does it work?

[SHISHKABOB]

how on earth do the people in space move around without any air or stuff to push off of? how??

[pixels]

expanding gasses push out of the rocket(s) pushing the ship forward.

this (http://www.thespacesite.com/space/future/fission.php) seems like a cool way to move around space ^^ fission

[Evangielis]

http://csep10.phys.utk.edu/astr161/lect/history/newton3laws.html

Check out Newton's third law of motion.

That's it in a nutshell.

[SHISHKABOB]

So you guys are saying that when basicly gas goes in one direction that the thing that pushed out the gas goes forward? Especially in like no gravity/friction areas?

[Evangielis]

Yup. That's it. If you want to experiment with it, try leaning on your desk. If the desk doesn't collapse under you that's because it's applying equal force against you to hold you up.

[ShawnManX]

Space isn't really empty, it has a density of like 4x10-really small particles per square mile or something like that, I'd have to do work to find out.

[Kahuzal]

Space isn't actually a vacume, it has gases in it, which would mean any faster-then-light (or atleast, very fast) ship would need to be airodynamicly built. GG borg cube from cracked out treckies.