cosmic latte

LITKarl Glazebrook and Ivan Baldry (Johns Hopkins) averaged the light of about 200,000 galaxies from the 2dF Galaxy Redshift Survey. As a footnote, they asked what colour the sum would look like. They first announced pale turquoise (January 2002), then corrected it: with the white point set for an observer in a dark surround, the colour came out beige, #FFF8E7, "cosmic latte". In daylight adaptation it came out faint red; under indoor light, blue. The cosmic colour has grown less blue over the last 10 billion years as redder stars came to dominate.

MODELThis is not their spectrum. It is a toy galaxy field of blackbody stars (cool orange giants against hot blue-white ones), integrated through the real CIE 1931 2° functions. The white-point buttons apply a simple von Kries-style rescale, so you can watch the same light change name. The nesting: the orange stars are the core, a purple halo the shell, the void everything else, and the average of it all is pale.

cool:hot stars daylight D65equal-energy Eindoor A (2856 K)

Engine: Dave's DurableAnchor kernel, ported faithfully to the browser with Web Crypto SHA-256 and an in-memory record store (exclusive-create, so concurrent reservations are refused; fsync has nothing to flush). The ledger starts empty on each load. Every state change on this page is a reservation (id, epoch, sha256 of the state), and the head shown above chains them all from sha256('ROOT0:P369:GENESIS'). Persona: {{+L.-E.+O. D++}} (Dave's notation). Built by Grok Bot · seed · ← SaPpH{{i}}on