A Deep Inquiry into Galactic SpiralArm Curling Evolution

The standard ΛCDM cosmological model attributes the nearly constant orbital speed of stars in the outer regions of galaxies to gravitational confinement by a steadystate darkmatter halo. Its core premise assumes a fixed, timeindependent distribution of darkmatter mass that compensates for the perceived “gravitational deficit” of visible matter and accounts for the nondeclining galactic rotationcurve observations. Nevertheless, a longneglected logical flaw persists within this framework. Over billions of years of evolution, spiral galaxies exhibit progressive winding of spiral arms, increasing curvature, and accumulating phase offsets between inner and outer stellar orbits. As galaxies enter late evolutionary stages, momentum input from centralblackhole outflows contracts the overall angularmomentum distribution, accelerating galactic rotation and further tightening spiralarm winding. Based on startostar chained gravitational drag dynamics derived from the LightOrigin Theory and inertialmotion principles in a frictionless cosmic vacuum, this paper points out that stars in outer galactic regions lack external driving forces to escape from the galactic system. The conventional assertion that insufficient gravitational pull would expel stars and require dark matter to lock galactic components represents a fundamental misconception originating from isolatedpointmass gravitational models. Progressive winding of spiral arms, lagged orbital motion of outer stars and accelerated rotation in latestage galaxies arise naturally from chaineddrag lag effects and angularmomentum contraction. By contrast, darkmatter models require adhoc adjustments to darkmatter density, distribution and total mass to fit galactic morphologies at successive evolutionary epochs. Such repeated parameter tuning violates the stability expected for objective physical laws. This analysis demonstrates that galactic dynamical evolution can be selfconsistently explained without introducing hypothetical patches such as dark matter or dark energy.