And the motion of the planets involves, in each case, four spheres, and of these also the first and second are the same as the first two mentioned above (for the sphere of the fixed stars is that which moves all the other spheres, and that which is placed beneath this and has its movement in the circle which bisects the zodiac is common to all), but the poles of the third sphere of each planet are in the circle which bisects the zodiac, and the motion of the fourth sphere is in the circle which is inclined at an angle to the equator of the third sphere;
Bestalde, planeten 25) mugimendua launa esferatan jarri zuen: lehenengoa eta bigarrena aurreko berak dira (izar finkoen esfera baita denak mugitzen dituena, eta beraren azpian dagoen eta Zodiakoaren erditik pasatzen den zirkuluaren araberako mugimendua duena, hori denek baterako duten esfera da); hirugarren esferak Zodiakoaren erditik pasatzen den zirkuluan ditu poloak;