How the Edge of Our Galaxy Defies Known Physics

Why not stop looking for speculative dark matter and energy? Look instead at your miriad of assumptions on which you base your  physics equations. Your physics gods all made false assumptions. Einstein divided by 0 to get infinity. Feinman assumed order to disorder. With galactic star movement, simply the arms move as a unit than stars orbiting the galactic centre. As weak as gravity is between  stars, it is still far stronger than that from the galactic centre; more like planets with their moons orbiting as a unit. Univere expansion assumes big bang which makes assumptions from background radiation and redshift, and of course interstellar and intergalactic magnetism isn't  caused by electric currents. Is it possible that gravity is a residual electric force caused by unbalanced ratio of charged particles or slight magnitude difference between positive and negative charges or even undiscovered wave properties, etc. There is so much we haven't  discovered and we make too many  assumptions from what we think we have.