From Magnetic Alignment to Gravitational Boundary Coupling

This paper develops a common physical-mechanism hypothesis within SP3 space-phase theory: materialbodies organize nested space-medium boundaries, and interaction with the medium conditioned by otherbodies produces torque and translational momentum exchange. Iron-filing alignment supplies themacroscopic magnetic example; the Stern–Gerlach experiment supplies the atomic beam example,including the spatially extended historical detector trace; and a rocket on its launch pad provides a gravitythought experiment that corrects an earlier misleading picture of repulsion as a universal outward shortrange force. In the proposed gravity model, attraction and repulsion refer to local, geometry-dependentnested-boundary interactions. The observable gravitational force is the resultant of distributed boundarytractions, not necessarily a difference between two independently postulated central forces. We formulateforce and torque as integrals of a common hypothetical medium traction, identify a point-body limit,distinguish experimentally established phenomena from SP3 interpretations, and set out tests requiredbefore specifying the constitutive boundary-stress law. No claim is made for experimental detection of theproposed medium beyond consideration of standard observations as representing SP3 nested mediuminteractions.