A Conjecture of Matter:The Gravitational Barrier of the Outer Solar System——Emergent Dynamics of the Saturn–Neptune Resonant Network

Standard celestial mechanics treats the outer giant planets—Saturn, Uranus, and Neptune—as independent perturbing masses whose interactions are limited to local orbital scattering. Here, we propose a paradigm shift: the 2:5 mean-motion resonance between Saturn and Neptune, coupled with Uranus’s spin–orbit evolution, constitutes a composite gravitational barrier system. This system is not merely a passive shield but an active, non-equilibrium dynamical engine. We demonstrate that this barrier exhibits three emergent properties absent from conventional N-body models: (i) an angular momentum "ratchet" (unidirectional rectification of external perturbations), (ii) a macroscopic gravitational "interferometer" (frequency filtering of trans-Neptunian objects), and (iii) a "time-keeper" (phase-locking that breaks temporal translation symmetry). Furthermore, we reinterpret Uranus’s anomalous 98° obliquity as the adiabatic output of this system's spin–orbit resonance, challenging the canonical giant-impact hypothesis. This framework provides new physical criteria for assessing the long-term stability of exoplanetary systems and redefines the outer Solar System as a self-organized criticality boundary. (This paper aims to provide a new idealized abstract model for the exploration of spacetime structure. This model is a natural philosophy conjecture of matter, and has not yet undergone independent experimental verification. It may therefore be revised or overturned by future rigorous testing. The author makes this conjecture publicly available and earnestly invites colleagues in physics and the philosophy of science to rigorously examine its logical coherence and physical reality. The authors acknowledge the use of an AI language model for literature organization, language polishing, and heuristic conceptual analogies. All core scientific hypotheses, analyses, and conclusions were independently derived by the human author, who bears full responsibility for the entire content.)