This frontier theoretical essay proposes a fundamental reinterpretation of celestial mechanics and the nature of dark matter. The central hypothesis suggests that the Sun possesses a stratified metallic core (a "Mega-Planet" approximately ten times Jupiter's mass), generating magneto-gravitational resonance frequencies that organize planets and satellites in vibrational nodes of the spacetime fabric, rather than in perpetual free fall. The argument rests on three pillars: (1) Systemic Isomorphism — structural unity among atoms, planets, and stars; (2) Cymatics — the organizing power of frequencies into geometric patterns; and (3) Dark Matter as elastic tension of the vibrating spacetime fabric, eliminating the need for hypothetical invisible particles. Key topics include: helioseismology and interpretive limits, the galactic center as Master Oscillator, orbital selectivity based on mass/inertia, the Moon as Earth's "perfect note," Comet Halley as a natural probe, and the "free fall fallacy." A low-cost experimental protocol (magnetic suspension in vacuum) is proposed to illustrate the principle of rotating field stability. This is an invitation to scientific imagination — an open challenge to theoretical physicists to develop the mathematical formalism that could transform this conceptual framework into a testable model.

This revision corrects a dimensional inconsistency in the presentation of the solar core hypothesis. The original text erroneously referred to the Sun's proposed metallic core as being "ten times larger in diameter" than Jupiter; it has now been corrected to accurately reflect the theoretical premise: a core with a mass approximately ten times that of Jupiter. This adjustment ensures internal coherence with the paper's concept of systemic isomorphism and the Sun-Jupiter analogy developed throughout the manuscript. No other changes were made.