Introducing ronna, ronto, quetta and quecto, the newest units of measurement

Four new prefixes have been added to the metric system to help measure the largest and smallest things in the universe. (Image credit: Shutterstock)

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For the first time in more than three decades, officials have designated brand-new prefixes that can be applied to units of measurement within the metric system. Four new prefixes — ronna, ronto, quetta and quecto — will allow scientists to quantify the very largest and smallest things in the universe.

The new prefixes were voted in by scientists at the 27th meeting of the General Conference on Weights and Measures (GCWM) (opens in new tab), which was held from Nov. 15 to Nov. 18 at Versailles Palace near Paris in France. The new terms are part of the International System of Units, also known as the metric system, which is the primary measurement system for every country in the world apart from Myanmar, Liberia and the U.S., which all predominantly use the imperial system of measurement, according to the CIA (opens in new tab)

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