the.com/constant
The one thing that never moves, in a universe that won't stop moving.
means Something that stays the same, unchanging and reliable, no matter what shifts around it.
from From Latin 'constans,' the present participle of 'constare' — 'to stand firm,' built from 'com-' (together, an intensifier) plus 'stare' (to stand). So a constant is literally something that stands its ground. It reached English through Old French 'constant,' carrying that same image of a thing planted and refusing to budge. Its cousin 'stare' fathered a whole family — 'stable,' 'status,' 'station' — all of them rooted in standing still.
- speed of light
- 299,792,458 m/s, exact by definition since 1983
- euler's number
- e shows up uninvited in growth, decay, and interest
- fine-structure
- roughly 1/137, and nobody knows why
- pi
- infinite, non-repeating, yet utterly dependable
- in code
- declared once, then yells if you change it
planck's constant — fundamental physics constant h = 6.626 × 10⁻³⁴ joule-seconds, basis of quantum mechanics
gravitational constant — universal physics constant g = 6.674 × 10⁻¹¹, determines strength of gravity between masses
speed of light — universal constant c = 299,792,458 m/s in vacuum, invariant in all reference frames