The Sky Seen from the Zero Region: Branch-Resolved Optical Signatures and CMB Remapping Benchmarks in a Periodically Closed Six-Throat Spacetime

We construct the observer sky map seen from the central Zero Region of the periodically closed six throat spacetime. The geometry produces a finite transmission aperture containing a nested family of critical optical curves that accumulate toward a finite sky radius. Full cycle Jacobi transport determines the first four critical curves and their rapidly contracting angular hierarchy. The returned rays retain branch history, circuit count and transverse parity, and the geometry provides an explicit same source multiple path remapping. The same completed metric also supplies a stationary CMB frequency transfer benchmark consistent with a present temperature of 2.72548 K. These parameter fixed targets provide direct observational tests of the finite globally closed six throat geometry.