Cosmology Without Origins

Modern cosmology has achieved extraordinary empirical success, but this success coexists with persistent foundational paradoxes. The standard model accurately fits a wide range of observations while simultaneously invoking global time, literal singularities, and an absolute origin; commitments that generate conceptual tension and remain weakly constrained by data. This paper argues that these tensions arise not from missing physics but from overcommitted interpretations. I propose a systematic reconstruction of cosmological inference that begins from a strictly minimal observational core and treats coherence, rather than causality or creation, as the primary explanatory constraint. I identify irreducible observables, systematic spectral shifts, a pervasive thermal radiation field, its remarkable spectral preservation, and the growth of correlated structure, and rebuild cosmology using only what is required for these facts to be mutually consistent. Within this framework, early global mixing and later differentiation emerge as coherence-maintenance strategies, while the cosmic microwave background is understood as a protected memory of an earlier regime. The Big Bang is thereby reinterpreted not as a physical origin but as a boundary of reconstructability marking the non-extendibility of the current coherence regime. The ΛCDM model is recovered as a powerful effective compression within this broader framework, but its surplus metaphysical commitments are shown to be optional rather than forced. The resulting coherence-first cosmology is empirically conservative and conceptually lean. It makes falsifiable claims concerning spectral purity, late-time interaction histories, and the limits of extrapolation, thereby remaining firmly within the domain of scientific theory rather than metaphysical speculation.