So what is this time thing anyway?

on YouTube ↗15m

" summary

Timeline claims that the second is now defined by cesium‑133 hyperfine transitions (1967) and that UTC is TAI minus an offset adopted 1972, with two leap seconds that year. GPS and Galileo satellites use spaceborne atomic clocks (cesium, hydrogen) while rubidium is cheap and miniaturized. Leap seconds are irregular and break common tools: the standard library and pendulum skip them, but astro pi handles them; some providers use leap second smearing and you must understand TAI vs UTC for precise ordering.

AI-written summary · about

" chapters (6)

1. 0:00Start
2. 0:12SAMUEL BISHOP
3. 7:07ROTATIONAL INSTABILITY
4. 8:54PYTHON AND LEAP SECONDS
5. 12:17STAYING AHEAD OF ZENO'S ARROW
6. 14:13LEARNING RESOURCES

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