Celestial spheres
The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus and others. In these celestial models th...
Working model and complete explanation of the Eudoxus's Spheres
A complete explanation, based on a working model, of the ancient Homocentric Spheres invented by Eudoxus of Cnidus some 2400 years ago to explain the motion ...
Dynamics of the celestial spheres
Ancient, medieval and Renaissance astronomers and philosophers developed many different theories about the dynamics of the celestial spheres. They explained the motions of the various nested spheres ...
Dynamics of the celestial spheres - Wikipedia