A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km s−1 Mpc−1 Uncertainty from the Hubble Space Telescope and the SH0ES Team
This SH0ES Team paper presents a refined local measurement of the Hubble constant using Hubble Space Telescope observations of Cepheid variables calibrating Type Ia supernovae. By expanding and improving the distance-ladder sample, the authors achieve roughly 1 km/s/Mpc total uncertainty. The result reinforces the significant tension with the Hubble constant inferred from the early-universe CMB.