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57、On the Mechanical Evolution Mechanism of the Flat Disk Structure
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Preprint of CERN doi :10.5281/zenodo.19760956 or https://doi.org/10.5281/zenodo.19760956 My academic identifier: orcid id: 0009-0005-2185-5790. You may go to the official academic website to retrieve and view relevant research content. Readers may copy this number to search on the official zenodo website (search by English title or English keywords) to view the full English and Chinese pdf texts. Abstract At present, the explanations for the flat structures of galaxies and stellar systems in astrophysics mostly remain at the phenomenological level of angular momentum conservation, without clarifying the underlying mechanical causes, long-term evolution process, and cross-galaxy hierarchical constraint mechanism of system flattening. Based on the classical mechanics system of central gravity, rotational inertia, and long-term force field preferential correction, this paper establishes a complete physical mechanism for the flattening evolution of celestial systems by combining the dual gravitational constraints of the Solar System and the Milky Way. The research shows that the Solar System and the Milky Way did not naturally form disk structures; both initially originated from diffuse nebulae with approximately spherical shapes, and gradually converged into flat disk morphologies through billions of years of continuous mechanical modification. The relatively stronger gravitational field in the solar equatorial region is the core internal cause for the coplanarity of planetary orbits, and the overall disk gravitational field of the Milky Way provides external mandatory constraints for the flattening of the Solar System. This paper strictly distinguishes the essential difference between static spherical gravitational fields and dynamic matter motion structures, and consistently explains the universal evolution law of macroscopic celestial systems without abstract assumptions such as space-time curvature, filling the theoretical gap in the structural evolution mechanism of current astrophysics. Keywords: celestial system; flat structure; gravitational field distribution; rotational inertia; orbital mechanical correction; galactic gravitational constraint 1.Introduction Macroscopic celestial systems in the universe show clear structural differentiation: single celestial bodies such as independent stars and planets stably present spherical structures, while multi-body systems such as the Solar System and the Milky Way stably exhibit flat disk structures. Current mainstream astrophysical research only qualitatively describes galactic flattening using angular momentum conservation, with three major defects:First, it fails to explain the dynamic mechanical process of celestial systems evolving from spherical diffuse forms to flat disks.Second, it ignores the external correction effect of the Milky Way’s macroscopic gravitational field on subsystems like the Solar System.Third, it does not strictly distinguish the physical difference between the inherent form of the gravitational field and the distribution of matter motion, resulting in a one-sided and incomplete theoretical explanation. Based on this, this paper takes basic mechanical laws as the core, combines the 4.6-billion-year evolution timescale of the Solar System, systematically explains the formation mechanisms of spherical structures of single celestial bodies and flat structures of galactic systems, clarifies the multi-level mechanisms of solar rotational differential gravity, Milky Way disk gravitational constraints, and long-term orbital inclination reduction, and constructs a unified, self-consistent, and traceable macroscopic celestial structure evolution theory.  |
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