Overview
- The H0 Distance Network, which published its consensus in Astronomy & Astrophysics on Friday, reports H0 = 73.50 ± 0.81 km/s/Mpc at just over 1% precision.
- The value sits nearly 10% above early‑Universe estimates from the cosmic microwave background under standard ΛCDM, deepening the multi‑sigma Hubble tension.
- Researchers built a Local Distance Network that ties together Cepheid and Mira stars, red‑giant tip measurements, Type Ia supernovae, megamasers, surface‑brightness fluctuations, Tully–Fisher, and Fundamental Plane relations.
- Tests show the result barely shifts when any single method is removed, which undercuts explanations that blame one hidden error in local distance data.
- H0 is the constant that tells how fast the Universe expands today, so a higher local value could steer theory toward new physics and guide targets for upcoming observatories using the team’s open data and software.