formula.expert

Constants library

1 value, each with its units, its uncertainty, and where it came from.

Astronomical 1

Cosmic Microwave Background Temperature measured

TCMB=2.72548 KT_{\mathrm{CMB}} = 2.72548\ \text{K}

KTemperature of the relic radiation from the Big Bang, 2.725 48 K — the most perfect blackbody spectrum ever measured, anywhere.