Wiktionary
Usage examples of "sphaera".
And you see a Wheel with two planispheres: one displays and teaches all the scientia of the Primum Mobile, and the second the doctrine of the Octava Sphaera and the fixed stars, and motion.
And you see a Wheel with two planispheres: one displays and teaches all the scientia of the Primum Mobile, and the second the doctrine of the Octava Sphaera and the fixed stars, and motion.