A new study used only pulsating Cepheid stars to calculate the expansion rate of the Universe. The resulting value of 71.1 (km/s)/Mpc turned out to be lower than the previous 'gold standard' and even further from the Planck satellite data. This sharpens the 'Hubble tension' and suggests our knowledg
arXiv:2509.09665 · 2025-09-11