JWST and Contraction Cosmology: Observables, Redshift Drift, and Early Structure

Abstract

Recent JWST observations report surprisingly massive and thermally evolved structures at high redshift, intensifying the “early-universe maturity” tension within expansion-based timelines. We outline a contraction-based framework in which the observed redshift is generated by scale evolution rather than metric expansion. We present a clean observable set {DL(z),DA(z),Heff(z), z˙(z)}, emphasize the sign-definite Sandage–Loeb redshift-drift prediction, and provide figures comparing key relations to ΛCDM.