Absolute Cosmology 09:Transformative Calculation of the Universe's True Age and Observable Size — On the Definitional Chasm with the ΛCDM Framework

This paper constitutes the ninth and final installment of the first volume of the Absolute Cosmology series. Building upon the absolute spacetime axioms and the Absolute Cosmic Transformation framework established in the preceding eight papers, this work presents a transformative calculation of the universe’s true age and observable size. Departing from the spacetime expansion model of mainstream cosmology, this study relies solely on the speed of light, the linear recession velocity field, and light-travel-time corrections to derive self-consistent cosmic parameters. Adopting the latest 2026 local-universe measurement of the Hubble constant as the sole observational driver, the results yield a universal age of approximately fourteen point three billion years and an observable radius of approximately forty-two billion light-years. The findings reveal that the discrepancies between these values and mainstream estimates stem not from computational error, but from fundamental ontological divergences regarding the definitions of time, spatial boundaries, and motion. Supported by multiple definitive experimental evidences—including the modified Michelson–Morley experiment, the Sagnac effect, GPS time-delay engineering practices, and observed superluminal quasar jets—this work demonstrates that the cosmos, when stripped of ad hoc relativistic constructs, assumes a profoundly different character. The paper concludes by arguing that the Absolute Cosmology framework restores physical intuition and logical parsimony to cosmological inquiry.