TRGB and Cepheid Calibrations Converge at 72.4 km/s/Mpc in Local Universe
What Was Observed (Empirical Data)
New JWST near-infrared observations of 18 Type Ia supernovae host galaxies resolve stellar crowding errors, solidifying the local expansion rate at H0 = 72.4 ± 1.1 km/s/Mpc.
The Reality Check (Anti-Hype Analysis)
Does NOT mean "Einstein was wrong." It sharpens the tension with Planck CMB early-universe predictions (67.4 km/s/Mpc) to 4.9σ significance, pointing toward potential new physics in early dark energy or neutrino sectors.
PRIMARY SOURCE:
arXiv Astrophysics