At first glance, an ancient relic recovered in Italy appears to be nothing more than a simple stone disk. However, the mysterious artifact may actually be able to point to where a major celestial event occurred thousands of years ago.
The stone disk is comparable to the size of a car tire and features engravings that are thought to resemble a celestial map of the night sky.
It is believed to be one of the oldest celestial maps ever discovered in human history. The stone was found at an ancient hill fort located in northeastern Italy at a site called Rupinpiccolo.
Hill forts were types of settlements that were guarded by huge stone walls called castellieri. At Rupinpiccolo, the castellieri dated between 1800 B.C. and 400 B.C. Researchers are uncertain how old the stone disk is, but it likely belongs to some point during that span of time, which means it is at least 2,400 years old.
They identified 29 chisel marks on the stone that were etched by a human hand. One face of the stone contains 24 marks, while the other has five.
Special software was used to categorize the marks into specific groups of stars, including the constellations Scorpius, Orion, Cassiopeia, and Pleiades, based on how they were positioned in the sky during the period when civilization at Rupinpiccolo existed.
The scientists confirmed that the engravings were deliberately made because they aligned too well with the distribution of the stars to be random. But among the 29 marks, one of them defied identification, which has caused speculations to arise.
The unidentified mark sat slightly to the north of Orion, and it may represent a star that had undergone a failed supernova.
A failed supernova is an astronomical event in which a star brightens as in the early stages of a supernova but does not continue the process of transforming into one. Failed supernovas are thought to create black holes when they collapse in on themselves and seemingly disappear from the sky.
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