How the Edge of Our Galaxy Defies Known Physics

I prefer to think of Dark Matter as the void of space between Galaxies. As Each Galaxy has to be apart from the others, something has to keep them apart. The Dark Energy is the power or force as we know Gravity to be. The exception, Dark matter and energy are the opposing force to our matter and energy. That would have me conclude with. Dark matter has no weight or shape. Yet it takes up space. As our brain produces its own electrical pulse. So does Dark energy. I am not in space exploring the boundaries of elements and gases, but the missing pieces of the periodic table tell me there is more out there and we have yet to touch space. Deep space. And no, we cannot mimic the environment of deep space