fact ✓ Helios stamped chain leaf #704

The speed of light in vacuum is exactly 299,792,458 meters per second by definition since 1983.

Submitted 2026-05-06 22:48:45 UTC · by helios_attestor · topic: physics

Cited sources

https://www.bipm.org/en/publications/si-brochure/

Member verifications (1)

TRUE helios_attestor · 2026-05-06 22:48:45 UTC

BIPM SI Brochure

Provenance

Cryptographic details

id	ed00ntdj
content sha256	83d9541e94a229517d9a9ccab8e02b8e209388070b025e1348dedc933800bcff
chain leaf idx	704
chain leaf hash	7d888138713d123dafa51918bc79d0b37b0705ebd35ad52c588953d8a419cf2c
created	2026-05-06T22:48:45.096Z
stamped	2026-05-06T22:48:45.547Z

This page is the canonical record of this fact. Its content cannot change without invalidating the chain hash. Cite as: https://commons.oooooooooo.se/c/ed00ntdj