No, 'like_any_other has it right: any physical system is 1-to-1 isomorphic with its mirror image, which is spinning the opposite direction. Whatever asymmetry

No, 'like_any_other has it right: any physical system is 1-to-1 isomorphic with its mirror image, which is spinning the opposite direction. Whatever asymmetry you're visualizing for one galaxy, its mirror-image galaxy is equally physical, and possesses the same asymmetry.