Jerry Stuckle wrote in news:m36d06$ui2$1@dont-
email.me:

Assuming this equation is correct, the temperature of the object
described is just 4 °C at Earth's orbit. Of course the earth is warmer
because it is warmed from the inside as well as from the sun.


That's part of it. But it's also because the Earth doesn't radiate all
that well, either. It holds a fair amount of the heat that strikes it.
Air is a great insulator


Also, greenhouse efeect, skewing the ratio of heat gained vs heat lost... The
UK just had a half-week of mid summer temps at Halloween. Never mind 'weather
vs climate', these recordsd are being broken all the time now.