Can’t ignore bosons; photon wavelength is a measure of temperature too.
Space has a temperature, which is based on the average of incoming radiation through that space; i.e. the thermal equilibrium to emit as much energy as is absorbed by a theoretical perfectly thermally conductive black body at that point in space.
Based off CMB radiation, space on average is a little over 2.7 kelvin. It’ll be hotter near stars, but the void dwarfs matter on a cosmic scale
I guess it depends on definition of the word “temperature”.
I was referring to the classical definition
In classical thermodynamics and kinetic theory, temperature reflects the average kinetic energy of the particles in a system, providing a quantitative measure of how energy is distributed among microscopic degrees of freedom.
Can’t ignore bosons; photon wavelength is a measure of temperature too.
Space has a temperature, which is based on the average of incoming radiation through that space; i.e. the thermal equilibrium to emit as much energy as is absorbed by a theoretical perfectly thermally conductive black body at that point in space.
Based off CMB radiation, space on average is a little over 2.7 kelvin. It’ll be hotter near stars, but the void dwarfs matter on a cosmic scale
TIL.
I guess it depends on definition of the word “temperature”.
I was referring to the classical definition
https://en.wikipedia.org/wiki/Temperature