re temperature of the dark sky in article apr news arc nasa gov moses pan arc nasa gov julie moses writes radiation field has been measured and modeled by various groups if i remember things correctly the models involved contributions from three different bb sources so there s no obvious temperature of background radiation in our local area indeed the sky doesn t look much like a black body if you look carefully enough in particular its temperature at radio frequencies is quite a bit higher than you would see from a black body morgan gordon s fat communications satellite handbook has a graph of sky temperature vs wavelength in fact for communications design however in terms of energy content the rf frequencies are negligible for thermal purposes at very large distances from the sun the sky looks like a black body at k allen astrophysical quantities i haven t found a number for non large distances since solar radiation tends to be something you can t just ignore but m g says about k in a brief discussion of why solar radiation dominates the problem svr resembles a high speed collision henry spencer u of toronto zoology between svr and sunos dick dunn henry zoo toronto edu utzoo henry
