Conceptual overview of the Local Distance Network, a many routes approach. Different methods for distance determination may connect the absolute scale determined by geometric means to H0. Background rectangles indicate from left to right where Rung 1, Rung 2, and Rung 3 of a traditional distance ladder would fall. Graphic by Fabio Crameri, ISSI, based on original from Casertano et al. (2025). Figure available from https://s-ink.org/local-distance-network
Conceptual overview of the Local Distance Network, a many routes approach. Different methods for distance determination may connect the absolute scale determined by geometric means to H0. Background rectangles indicate from left to right where Rung 1, Rung 2, and Rung 3 of a traditional distance ladder would fall. Graphic by Fabio Crameri, ISSI, based on original by Richard I. Anderson from Casertano et al. (2025). Figure available from https://s-ink.org/local-distance-network
Published: 12 December 2025

Online Panel Discussion with Stefano Casertano, Richard I. Anderson, Eleonora Di Valentino, Adam Riess, and Licia Verde

recorded December 11, 2025

Game Changers Online Seminar
Hubble Constant
Universe Expansion
Hubble

The Local Distance Network to measure the Hubble Constant at ~1% precision

Online Panel Discussion with Stefano Casertano, Richard I. Anderson, Eleonora Di Valentino, Adam Riess and Licia Verde

The Hubble constant is widely acknowledged as a key test of our understanding of cosmology and the history of the Universe: its locally measured value differs from prevailing cosmological predictions with very high significance. The participants in a weeklong ISSI workshop in March have developed a new formalism, the Distance Network, to enable a rigorous analysis of a large, diverse set of distance measurements, yielding a more precise and robust value of the Hubble constant – and strengthening the discrepancy with cosmological predictions. The Distance Network formalism will be made publicly available and has the capability to incorporate future measurements as they become available.