Is he then saying that the mean temperature of the Moon is +38 °C (which is his 40 ° plus the -2 °C
blackbody prediction)?
And that temperature exceeds
the blackbody prediction of 81 K for Saturn.
Nevertheless, at a certain point atmospheric temperature rises along with pressure and far exceeds NASA's
blackbody prediction of 226.6 Kelvin for Venus.
I've inserted
the blackbody prediction for each body so that you can compare it to actual temperatures at that pressure point.