3,600-year-old sky map revealed: The Nebra sky disk transformed astronomers' understanding of the Bronze Age

One of the most amazing archaeological discoveries ever to be found was the Nebra Sky Disk. This archaeological wonder was discovered illegally by metal detectorists in some corner of Germany in 1999. The disk dates back to the era of about 1600 BC, making it an ancient artefact about 3,600 years old. The Nebra Sky Disk is commonly believed to be the world's oldest tangible representation of the universe at night. Discovered in the vicinity of Nebra in central Germany, the Nebra Sky Disk comprises golden images of celestial objects such as the sun, the moon and the Pleiades star constellation.The history of the Nebra Sky Disk dates back to 1999, when the artefact was discovered by two looters using metal detectors during an illegal excavation conducted on Mittelberg hill close to the village of Nebra in Germany. Other artefacts discovered during this illegal dig were a set of weapons, including swords, axes, armlets, and a chisel, all made of bronze.It is after some years that the artefact was confiscated in Switzerland in an operation carried out by the police force. The authenticity of the disk was determined by the researchers, and it was declared that the artefact originated from the Bronze Age.According to an official research titled ‘The Nebra Sky Disc - an early Bronze Age find of exceptional importance’ done by the State Office for Heritage Management and Archaeology of Saxony-Anhalt, the age of the disc was determined to be 1600 BC due to the presence of bronze swords and axes claimed to be found in the same region. The artefact is currently exhibited in the State Museum of Prehistory.Having a diameter of 32 cm, the disk is decorated with inlays of celestial objects made of gold. According to scientists, a large golden circle stands for the Sun, or a full Moon, and a golden crescent represents the Moon. A group of seven stars, which were found close to one another, are thought to represent the Pleiades.Further on, additional arches appeared that were connected to the position of the sun at sunrise and sunset during the summer and winter solstices. It implies that the disk could have served as an instrument used to synchronise lunar and solar calendars.In their latest study published in Archaeologia Austriaca, scientists claim that "the Nebra Sky Disk displays an extraordinarily complex combination of astronomical knowledge and religion."This discovery proved wrong the theory that astronomical observations carried out in Europe during the Bronze Age were considerably less advanced than those performed in civilisations of the Near East.The Nebra Sky Disk stands out due to its seemingly ambitious endeavour of portraying the entire sky rather than just specific astral symbols.Experts from the Saxony-Anhalt Department for Cultural Heritage have called it "the oldest concrete depiction of cosmic phenomena" ever discovered in the world.The arrangement of astral symbols looks like an intentional one and could serve to determine different seasons. According to some researchers, the disk bears testimony to accumulated experience gained from observing the night sky for many years in a row.Some researchers point to potential connections of Central Europe with Bronze Age cultures from elsewhere.Even today, more than twenty years after its discovery, the Nebra Sky Disc continues to amaze scientists and scholars in various fields.It is not merely an archaeological treasure but also important from other perspectives, as it gives us valuable information on how ancient peoples perceived time and seasons and tracked the motion of celestial objects.Back in 2013, the Sky Disk became one of the entries on UNESCO's "Memory of the World" registry, emphasising its cultural importance at the international level.The continued investigation of the Nebra Sky Disc with the help of state-of-the-art methods and tools shows us that our interest in the skies above has been around for millennia, long before we had any means of studying space.