Jewelry Design Star Map Necklace by Austin Scribner Star Map is a custom necklace that shows the night sky as it appeared at a chosen time and place. The pendant carries a darkened engraving of constellations, orbital lines and the Milky Way, while circular cutouts represent the planets of the solar system. Each pendant measures 31.75 mm in diameter and 1.4 mm in thickness, and is made of brass plated with 14k gold, sterling silver or rose gold. A central hole holds the chain, which is adjustable up to 22 inches. The design keeps a personal moment in lasting form.