Physical Constants Reference

Reference of Physical Constants and Units

The Physical Constants Reference is an unpowered data record etched into stone, nickel, and quartz substrates that archives thirty fundamental physical constants, SI unit definitions, and the periodic table to ground the Lunar Ark in physical reality. Preserving this record against lunar environmental extremes—including hard vacuum, cosmic radiation in the absence of a magnetosphere, and 300 K thermal swings across 14-day nights—requires zero-power physical redundancy rated for a ten-billion-year lifetime. The entry utilizes non-terrestrial references, such as the 21-centimeter hydrogen wavelength, to define dimensions and physical values independently of Earth-specific measuring systems.

Reference of fundamental physical constants (speed of light, Planck, etc.) and unit definitions — enabling future intelligences to ground the archive in physical reality.