The discrepancy between this local measurement and estimates from the early universe, which shows up in many studies, is called the Hubble tension. The new measurements rule out explanations that rely on a single overlooked error in local distance measurements, according to the researchers. This finding suggests the tension may point to new physics beyond the standard cosmological model.
The discrepancy could be due to unaccounted factors such as dark energy, new particles, or changes to gravity, though what specific new physics or cosmological model could explain it remains unknown. Whether dark energy, undiscovered particles, or modified gravity are the actual causes of the discrepancy is also unclear. The research is published in the journal Astronomy & Astrophysics in a paper titled 'The Local Distance Network: A community consensus report on the measurement of the Hubble constant at ∼1% precision'.
How this tension will affect future astronomical research and our understanding of the universe is yet to be determined.