Extending the Space-Phase Stiffness Scale: RBH-1 Wake Persistence as a Galactic-Scale Constraint

Previous work within the SP3 (Space‑Phase Three‑State) framework introduced astiffness‑across‑scale ladder, anchored by coronal mass ejection (CME) expansion behavior,planetary orbital persistence (Earth and Mercury), and horizon‑scale coherence inferredfrom Event Horizon Telescope (EHT) ring structures. In this paper, we extend that ladderusing observational evidence from RBH‑1, a recoiling supermassive black hole that leavesbehind a narrow, coherent wake extending approximately 62 kiloparsecs. Withoutredefining stiffness or altering the original CME analysis, RBH‑1 is introduced as a newlabeled point on the same stiffness axis and as the basis for a companion figure formallyextending the stiffness scale to galactic recoil events. The persistence and narrowness of theRBH‑1 wake provide an unprecedented galactic‑scale constraint on space‑phase stiffness,reinforcing the interpretation of space as a physical medium with measurable resistance tolateral diffusion and coherence loss.