The Hubble Constant is a central feature of any theory about the evolution and ultimate fate of the universe. People want the actual, real, universe-expanding Hubble Constant, and no one is eager to round it up to the nearest 10. Over time, the Hubble Constant isn't constant.) And any disparities in the measurement of the Hubble Constant would surely be ironed out with further observations, scientists assumed. And Riess points out that a completely different technique, scrutinising seven gravitational lenses, has produced an average Hubble Constant estimate of 73.7.

Source: Stuff November 01, 2019 22:52 UTC