Do Ancient Coins Record the Supernova of 1054?

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Could a set of coins be the only proof the Europeans saw the supernova that created the Crab Nebula? - by AndyTomaswick

Credit – SciShow Space YouTube Channel

Which makes it even more interesting that a metalworker, or maybe one of the otherwise cowed scholars, might have had the nerve to do so. The researchers found a special edition of a coin, known in the technical jargon as the Constantine IX Monomachos Class IV coin, which has two stars compared to the single star noticeable on the other three classes of coins minted during the monarch’s reign.

The Class IV is thought to be minted between the summer of 1054 and the spring of 1055 and has two noticeable stars on either side of the monarch’s head. One star is thought to represent Venus, the Morning Star, while the monarch’s head itself is believed to represent the sun. The other star, though, could potentially represent the “guest star” of the SN 1054 supernova.

What’s more, the size of the stars differs slightly between the 36 coins of that vintage the researchers were able to find in museums around the world. The researchers also hypothesize that the changing size of the star could reflect the gradual dimming of the supernova in the sky during this period.Credit – Filipovic et al

If so, it would be a very subtle but effective nod to the striking astronomical reality going on overhead at the time. But, as with much ancient history, it is hard to separate fact from speculation. The authors themselves point out that they don’t know how many Class IV coins were minted, nor their precise dates and they have no concrete proof that the second star represents a fantastic astronomical event.

 

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