The 26th General Conference on Weights & Measures (GCWM), which is comprised of 60 member countries, voted for the redefinition of Kilogram. It will be adopted on May 20, 2019 which is World Metrology Day.
Now it will be affixed to the Planck constant, a fundamental concept in quantum mechanics that can never, ever change — here on Earth or in the deep reaches of the universe.
The existing definition of the kg is over 130 years old and defined as the mass of a hunk of platinum-iridium alloy that’s been housed at the International Bureau of Weights and Measures in Sevres, ....
