Page:Huygens-Celestial-Worlds-Discovered.pdf/41

Rh Reflection from the Snow that covers the Tops of the Hills in Jupiter: But I hould rather think that it is only the Colour of the Earth, which happens to be free from thoe Clouds that commonly darken it.

Mars too is found not to be without his dark Spots, by means of which he has been oberved to turn round his own Axis in 24 Hours and 40 Minutes; the Length of his Day: but whether he has Clouds or no, we have not had the ame opportunity of oberving as in Jupiter, as well becaue even when he is nearet the Earth, he appears to us much les than Jupiter, as that his Light not coming o far, is o brisk as to be an Impediment to exact Obervations: And this Reaon is as much tronger in Venus as its Light is. But ince ’tis certain that the Earth and Jupiter have their Water and Clouds, there is no Reaon why the other Planets hould be without them. I can’t ay that they are exactly of the ame nature with our Water; but that they hould be liquid their Ue requires, as their Beauty does that they hould be clear

C