I recently watch a lecture by Neil Tyson where he said the closest thing we have to a vacuum is interstellar space. I believe he said there will be one atom per 1 cubic meter or something close to that. I know that pressure equalizes, meaning that a higher pressure systems will move towards low pressure systems to reach an equilibrium. So I was wondering how that works. Do all the atoms in space try to get equidistant from one another to maintain reach an equilibrium pressure. If you made a 1 cubic foot sphere and put a single atom in it. Does pressure play a part there? Would the atom find the center of the sphere and stay there? Would it just bounce around unconcerned with equalizing pressure?
I'm sorry if this seems scatter brained. Whenever I watch a Neil Tyson video my brain is overloaded with curiosity.