![LGC on Twitter: "A metre is the distance travelled by light in 1/299792458 of a second, but on 20 May 2019 the metre, along with 6 other units of #mesurement, will be LGC on Twitter: "A metre is the distance travelled by light in 1/299792458 of a second, but on 20 May 2019 the metre, along with 6 other units of #mesurement, will be](https://pbs.twimg.com/media/DscTJS6WkAUAP4g.jpg:large)
LGC on Twitter: "A metre is the distance travelled by light in 1/299792458 of a second, but on 20 May 2019 the metre, along with 6 other units of #mesurement, will be
![WORLDKINGS - On This Day - September 28, 2018 - The third legal definition of the metre was adopted at the Paris General Conference in 1889 - Worldkings - World Records Union WORLDKINGS - On This Day - September 28, 2018 - The third legal definition of the metre was adopted at the Paris General Conference in 1889 - Worldkings - World Records Union](http://wcsa.world/Userfiles/Upload/images/metre-kilo.jpg)
WORLDKINGS - On This Day - September 28, 2018 - The third legal definition of the metre was adopted at the Paris General Conference in 1889 - Worldkings - World Records Union
Paul Coxon on Twitter: "Important day for SI nerds, the meeting to formally redefine the kilogram, the kelvin, the ampere and the mole is happening today! Watch a livestream of the vote
![China High definition China Acrel Pz72L-De LCD Panel Mounted Solar Power Mornitoring Meter Energy Meter China High definition China Acrel Pz72L-De LCD Panel Mounted Solar Power Mornitoring Meter Energy Meter](https://global.linyang.com/uploads/3dd648fe.jpg)
China High definition China Acrel Pz72L-De LCD Panel Mounted Solar Power Mornitoring Meter Energy Meter
![Arsenic concentrations – published October 2015 - Environmental indicators Te taiao Aotearoa - Stats NZ Store House Arsenic concentrations – published October 2015 - Environmental indicators Te taiao Aotearoa - Stats NZ Store House](https://statsnz.contentdm.oclc.org/iiif/2/p20045coll34:22/full/730,/0/default.jpg)