The mystery to me has always been, if there is one, how do you achieve thrust motion in space if this is the actuality here on earth in an atmosphere under pressure. What are the forces allowing for that with 'no pressure' conditions existing? Is it really that law 'every action results in an equal but opposite reaction'? Thats the one I have a hard time buying. But then again, I don't have a vaacuum handy to do an experiment in! Lol
That's easy. It's exactly what you said, so when you burn some fuel and exhaust it into space, the ship forces the exhaust out and the exhaust forces the ship forwards or whatever direction is needed, equally and opposite to the original force.
Even better, in spaced you don't have to deal with air resistance and the force of gravity is much less, so the forces stopping you are far less as well.
Its actually easier than how planes work, and far more fuel efficient.
I don't know why you think an atmosphere or pressure is required. but if you want to build one just google it, there's some good instructions out there