Just a small note... Itīs not quite correct to say that the temperature drops with the higher the altitude. When reaching the stratosphere(?) the temperature will start to rise again to about 0 degrees C, since the UV radiation is absorbed in this layer. Weīre now around 25 miles up. Still further up the temperature will drop again, in the Mesosphere, to about -95 degrees C, 40-50 miles up in the blue

. Above that comes the Thermosphere and as the name suggests it gets warmer again, up to 1,700 degrees C due to the Sunīs energy. I think NASA has some exact numbers somewhere on their site, not sure though but it seems likely.