Constant of Max Planck seems to be the smallest unit of measure of the universe. Its value is 6.626068 × 10*exp(-34) m² kg / s (ou J/s) Equation of Planck: E=hf=hc/lambda, where E=energy, f=frequency, h=constant of Planck, c=speed of the light, lambda=langth of the radio wave Research of Planck allowed Einstein to elaborate his theory of the relativity five years later. See relativity, distance of Planck, relativity, Hubble constant, time of Planck