Sunrise on Earth as viewed from space

© Pixabay PIRO4D


An analogue round clock with legs is overtaken by a rotating earth with legs while running.
© GEO/SBoehm

On 26 August 2023, universal time determined by Earth rotation (UT1) overtook the coordinated universal time (UTC), defined by atomic clocks. UT1 led…

Closeup photo of the hands and number on a silver watch
© Agê Barros @

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Construction work with sparks
© Christopher Burns

Soft launch