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The Logo


Static logo image


The logo for The COSETI Observatory is presently under design. The expression above "COSETI" is well-know to scientists and engineers. It indicates that the energy in a quanta of light, otherwise known as a photon, is much greater that thermal kT energy. Thus, the reference to "hot" optical photons in comparison to "warm, fuzzy" microwave photons. This was a favorite comment of the late Barney Oliver in reference to his very strong preference for the microwave approach to SETI.


The parameters in this classic formula have the following values:

h = Planck's constant (6.63 x 10-34 J.s)

f = frequency (4.57 x 1014 Hz) for a visible wavelength of 656 nm

k = Boltzmann's constant (1.38 x 10-23 J/K)

T = temperature (300 K)


hf = 3.03 x 10-19 Joules

kT = 4.14 x 10-21 Joules


Proving that at visible optical frequencies and room temperatures, hf is greater than kT by two orders of magnitude.


Thermal kT Noise Primer

Quantum hf Noise Primer


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