"That the planets are not without Water, is not made probable by the late observations: For about Jupiter are observed some spots of a darker hue than the rest of his Body, which by their continual change show themselves to be Clouds...Mars too is found not to be without his dark spots... but whether he has clouds or no, we have not had the same opportunity of observing as in Jupiter. Since ‘its certain that Earth and Jupiter have their water and clouds, there is no reason why the other Planets should be without them. I can’t say that they are exactly of the same nature with our Water, but they should be liquid their use requires, as their beauty does that they should be clear. For this Water of ours, in Jupiter or Saturn, would be frozen up instantly for reason of the vast distance of the Sun. Every Planet therefore must have its Waters of such a temper as to be proportione’d to its heat."