India, April 12 -- An international team of at least 45 astronomers, including researchers from Inter-University Centre for Astronomy and Astrophysics (IUCAA), has achieved the most precise direct measurement yet of the Universe's expansion rate, offering new insight into one of modern cosmology's biggest puzzles, the "Hubble tension."

The Hubble tension is the disagreement between the Universe's expansion rate measured in the nearby Universe and the value predicted from observations of the early Universe.

The study, conducted by the Ho Distance Network (H0DN) Collaboration, reports the Hubble constant as: Ho = 73.50 ± 0.81 kilometres per second per megaparsec.

A megaparsec equals about 3.26 million light-years. The result indicat...