This study provides a quantitative validation of the exponential redshift model (Nagata 2026) using 1,701 Type Ia supernovae from the Pantheon+ dataset. The model, which assumes a static, closed universe with a curvature radius of 14 billion light-years, achieves a reduced chi-square of 0.51 and an RMS error of 0.181 mag with zero free fitting parameters. This work has been submitted to AAS journals for formal peer review.
Hirokazu Nagata (Thu,) studied this question.