Tuesday, November 29

They discover a medieval map that has a hidden star codex | Digital Trends Spanish

An impressive discovery revealed by the Nature magazineindicates that an ancient medieval text corresponding to a parchment from the monastery of Saint Catherine in the Sinai Peninsula in Egypt, could in fact be the catalog of lost stars of Hipparchus, considered to be the first known attempt to map the entire planet. night sky.

In 2012, the student of noted biblical scholar Peter Williams noticed something curious behind the letters of the Christian manuscript he was analyzing at Cambridge University. For his part, the student, Jamie Klair, had stumbled across a famous passage in Greek that was often attributed to Eratosthenes; astronomer and chief librarian of the Library of Alexandria.

In 2017, multispectral imaging of the document revealed nine folios of pages that contained hints of a text that had been written, Williams noticing some odd numbers on the folios at St. Catherine’s Monastery.

When he turned the page to scientific historians in France, researchers were shocked. Historian Victor Gysembergh of the French national center for scientific research CNRS in Paris he told Jo Marchant in Nature that “it was immediately clear that we had stellar coordinates.”

What experts do know, however, is that the Greek astronomer, Hipparchuswas working on a catalog of stars in the sky of the Western world between 162 and 127 BC.

According to the researchers, the hidden passage reads thus:

“The Corona Borealis, situated in the northern hemisphere, in longitude spans 9° 1/4 from the first degree of Scorpio to 10° 1/48 in the same zodiacal sign (i.e. in Scorpio). In width it spans 6°3/4 from 49° from the North Pole to 55°3/4.

Within it, the star (β CrB) to the west next to the bright one (α CrB) conducts (i.e. is the first to rise), being at Scorpius 0.5°. The fourth star 9 (ι CrB) to the east of the bright one (α CrB) is the last (i.e. to rise) [. . .] 10 49° from the North Pole. The southernmost (δ CrB) is the third counting from the bright (α CrB) to the east, which is 55° 3/4 from the North Pole.

The notations match the ancient Greek terminology. The term “longitude” is based on the East-West spread of a constellation, while “width” describes the North-South spread of the constellation.

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