Gravitational Wells and the Viscous Nature of Inertia: Refuting the Dark Matter Hypothesis via QC-Medium Phase Transitions.

This research (Article 2 in the series) presents a fundamental reassessment of the "hidden mass" problem by introducing the mechanism of phase transitions within the Quantum Core (QC) medium. The author demonstrates that the observed gravitational anomalies, currently attributed to Dark Matter, can be more accurately explained through the hydrodynamic resistance of the vacuum. Key highlights of this work include: Refutation of the Dark Matter Hypothesis: Evidence that galactic rotation curves are a result of QC-medium viscosity rather than invisible mass. Pioneer Anomaly Solution: Mathematical proof that the anomalous acceleration of the Pioneer 10/11 spacecraft is a direct consequence of the medium's resistance during phase transitions. Inertia as a Viscous Effect: A new derivation showing that inertia is not an intrinsic property of matter but a result of interaction with the Z-thickness of the vacuum. Mathematical Proofs: Detailed calculations showing how the medium transitions from a state of low resistance inside gravitational wells to high viscosity at their periphery. This work continues the foundational concepts established in "Fundamental Z-thickness of the QC-medium" (DOI: 10.5281/zenodo.18167986), providing a unified framework for understanding celestial mechanics and vacuum geometry.