Eratosthenes of Cyrene On the Adornment of Stars and Their Etymology in Greek

The treatise On the Adornment of Stars and Their Etymology is a work attributed to the Hellenistic scholar Eratosthenes of Cyrene, though it is not directly listed under this precise title in ancient bibliographies. The primary source for his astronomical writings, the Byzantine patriarch Photius, records a work titled Catasterisms, a collection of myths explaining the origins of the constellations. The title On the Adornment of Stars and Their Etymology is therefore considered a descriptive paraphrase of that subject. The surviving text of the Catasterisms is likely a later epitome or compilation from the Roman period, based on Eratosthenes' original, now lost, treatise. The content, as preserved, systematically catalogues the constellations of the northern and southern celestial hemispheres, listing figures such as Ursa Major, Ursa Minor, Orion, and the signs of the zodiac. Its principal themes included the aetiological myths for star patterns, the standardization of disparate mythological narratives, the etymology of stellar names, and the bridging of traditional mythology with the study of the heavens. Eratosthenes' systematization of these constellation stories became a standard reference work. Its influence was profound and enduring, as later mythographers like Hyginus drew upon this material, ensuring its transmission and shaping the celestial storytelling tradition in Western astronomy and iconography throughout the medieval and Renaissance periods.