Building methods and materials utilized
Construction materials and techniques used in making armillary spheres
History and evolution of the armillary sphere instrument design How to use an armillary sphere for celestial navigation purposes Significance of armillary spheres in ancient astronomy and astrology Comparison between armillary spheres and modern astronomical instruments Famous astronomers who used armillary spheres in their research work Symbolism and cultural representations associated with armillary spheres The role of armillary spheres in teaching astronomy and celestial mechanics