The Nebra sky disk is a bronze disk of around 30 cm diameter and a weight of 2.2 kg, with a blue-green patina and inlaid with gold symbols. These are interpreted generally as a sun or full moon, a lunar crescent, and stars (including a cluster interpreted as the Pleiades). Two golden arcs along the sides, marking the angle between the solstices... http://en.wikipedia.org/wiki/Nebra_sky_disk Dbachmann - photograph taken when the artefact was on display in Basel, Switzerland in December 2006