⏳🌍¹

#universal time #UT1 #time scale #earth rotation #celestial mechanics

🌍⏳🦕

#geological era #prehistoric #age of dinosaurs #time scale #earth history #past epoch #cenozoic #mesozoic #paleozoic

⏱️→⏰→📅→🗓️

#second #minute #hour #month #time scale

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#short duration #quick interval #instantaneous #high frequency #rapid events #femtosecond #picosecond #time scale