Skip to main content
Everyday science

Everyday science

New SI prefixes go large and small, using physics to avoid sauce splatter

18 Nov 2022 Hamish Johnston
The Earth as seen from space
Several ronnagrams: Earth as seen by the crew of Apollo 17. (Courtesy: NASA)
Say hello to the first new SI prefixes since 1991. At the humongous end of the scale, ronna and quec

You’ve reached the limit of what you can view on Physics World without registering

If you already have an account on Physics World, then please sign in to continue reading

If you do not yet have an account, please register so you can

  • Access more than 20 years of online content
  • Choose which e-mail newsletters you would like to receive
Back to Everyday science Everyday science
Copyright © 2026 by IOP Publishing Ltd and individual contributors