Measuring time & Atomic clocks

▸ Loading 4 rungs of timekeeping: sundial → pendulum → quartz → atomic…

▸ Calibrating ¹³³Cs: 1 second = 9,192,631,770 oscillations

▸ Enabling accumulated-error comparison (accuracy scale)

▸ Loading GPS + leap seconds…

▸ Online. ✅

Now showing

⏱️ Clock

Drift / day—

Count frequency—

Scenario—

Definition of the second

—

Change the Scenario to view each timekeeping technology · click a technology on the right for details

Accuracy by technology (log scale)accuracy

About Measuring Time

Measuring Time is one of 20 topics in the Cosmic Timeline domain (Big Bang → ∞ scale) at My Labs — an interactive simulation atlas. This virtual lab runs right in your browser: adjust the parameters, pick a scenario and watch the phenomenon change in real time, with a click-to-inspect cross-section for every structure.