Colores ratio altitudinum temperat, siquidem earum similitudinem trahunt in quarum aera venere subeundo, tinguitque adpropinquantes utralibet alieni meatus circulus, frigidior in pallorem, ardentior in ruborem, ventosus in livorem, sol atque commissurae apsidum, extremaeque orbitae, atram in obscuritatem. suus quidem cuique color est, Saturno candidus, Iovi clarus, Marti igneus, Lucifero candens, Vesperi refulgens, Mercurio radians, lunae blandus, soli cum oritur ardens, post radians
‘The colours of the planets vary with their altitudes, inasmuch as they are assimilated to the stars into whose atmosphere they come in rising, and the circuit of another’s path modifies their colour in either direction as they approach, a colder circuit to pallor, a hotter one to redness, a windy one to a leaden colour, the sun and the intersection of its orbit with theirs, and also the extremities of their paths, changing them to black darkness. It is true that each has its own special hue—Saturn white, Jupiter transparent, Mars fiery, Lucifer bright white, Vesper glaring, Mercury radiant, the moon soft, the sun when rising glowing and afterwards radiant’