25The stars making up the Milky Way (galaxias kyklos) not being resolvable by the naked eye were anciently perceived as a single belt-like object. Here it is a solid structure with two ends (presumably in those parts never visible in the Northern hemisphere) holding up the drumlike firmament into which stars are inserted. By means of the two chains it supports the spindle (axis) upon which turn the whorls (one for the stars and one for each orbit) onto which the sun, moon, and planets are each distributed. The full support for these differently situated whorls is not fully worked out, nor is it ever fully explicated how each (partly) steel whorl can be transparent to our view.