Brass armillary 5 inches sphere sculpture with wood base metallic dark gold finish over the armillary sphere orbs equatorial poles and numbered meridians carved numbers throughout the northSouth meridian and astrological symbols and names carved into the metal center ring The concept of the celestial sphere was fundamental to astronomy from Antiquity through the Middle Ages and into the early Modern era At the center of the sphere is the Earth As the Earth is stationary in this model it is the celestial sphere which rotates about it and acts as a reference system for locating the celestial bodies stars in particular from a geocentric perspective The celestial instrument is composed of rings that represent the principal circles of the celestial sphere The brass sphere at the center of the armillary represents the Earth Armillary spheres or globes have become an icon of science with their elegant rings and beautiful silhouettes Our Nautical Marine Collectibles are a good gifting option on occasion of Birthday Anniversary Retirement Special Occasions like Christmas Halloween or Can be used for Home or Office Decoration as an piece of Art Collection Our Nautical Marine Collectibles are a good gifting option on occasion of Birthday Anniversary Retirement Special Occasions like Christmas Halloween or Can be used for Home or Office Decoration as an piece of Art Collection BRAND NauticalMart Inc Worlds Largest Collection of Nautical Collectibles Furniture and Home Decor Since 1991