Why Did the Spiral Arms of Galaxies Form?
Image credit: NASA / JPL Expansion Freedom Theory https://zenodo.org/records/21199818 Gravitational Flux Transport Networks · Expansion Freedom Theory Why Did the Spiral Arms of Galaxies Form? Every stable orbit has a ceiling — and it's lower than the point where orbits stop existing altogether. That instability boundary, not some mysterious force, is where the spiral begins. JongJin Ma · July 2026 · Expansion Freedom Theory series Our own solar system almost certainly had spiral arms once. In the early, crowded disk of gas and debris around the young Sun, countless small bodies moved on paths that were not yet clean ellipses — some drifted inward and were consumed, some were flung outward and lost, and a very particular subset survived: the ones whose speed happened to match a stable orbit at their distance. What we call "the solar system" today is really the surviving pop...