Until someone folds the paper.
press release about coordinated space debris?
how do I adress the stupidty of your suppostions?
What is a vacuum? A 'vacuum' is a concept in physics of a region of space void of material.
the key part is 'concept'. In fact space can not be proven to be 'empty'.
also the propulsion of the material out the back produces thrust in the opposite vector.
slide yourself over to a description of 'noozles'
you non science/engineering people, you are so easy to confuse.
so you suppose 'such and such is 'true' but only if I am aware of it?
you just playing word games and redefintion as a tool of confusion.
if you have no awareness, does your universe not exist?