File:Γρηγορίου Χιονιάδου επιστολαί ιστ´- Αθήνα - 1902.jpeg

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Ελληνικά: Επιστολές του Γρηγορίου Χιονιάδη, Αθήνα, 1906, σύνταξη Τρύφων Ευαγγελίδης Ο Γρηγόριος Χιονιάδης (γεν. 13ος αιώνας - θαν. περίπου το 1320) ή Γεώργιος[1][2], ήταν Βυζαντινός αστρονόμος, ιατρός, και κληρικός. Ταξίδεψε στην Περσία όπου μελέτησε τα περσικά μαθηματικά και τις περσικές πραγματείες της αστρονομίας, και τις σημαντικές γνώσεις που αποκόμισε τις μετέφερε κατά την επιστροφή του στο Βυζάντιο,[3] όπου και ίδρυσε μια ακαδημία αστρονομίας στην Τραπεζούντα. Διετέλεσε επίσης και ορθόδοξος μητροπολίτης Ταυρίδος (σύγχρονο Ταμπρίζ στο βορειοδυτικό Ιράν).
English: Epistolae of Gregory Chioniades, Athens 1906 edition by Trifon E. Evagelides. Gregory Choniades (Choniates, Chioniades) (died 1320) was a Byzantine Greek astronomer. He travelled to Persia where he learnt Persian mathematical and astronomical science which he introduced into Byzantium upon return from Persia[1] and founded an astronomical academy at Trebizond. Choniades also served as Orthodox Bishop in Tabriz.
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Source http://anemi.lib.uoc.gr/search/?dtab=m&search_type=simple&search_help=&display_mode=overview&wf_step=init&show_hidden=0&number=10&keep_number=10&cclterm1=&cclterm2=&cclterm3=&cclterm4=&cclterm5=&cclterm6=&cclterm7=&cclterm8=&cclfield1=&cclfield2=&cclfield3=&cclfield4=&cclfield5=&cclfield6=&cclfield7=&cclfield8=&cclop1=&cclop2=&cclop3=&cclop4=&cclop5=&cclop6=&cclop7=&isp=&search_coll%5Bmetadata%5D=1&&stored_cclquery=creator%3D%28%CE%A7%CE%B9%CE%BF%CE%BD%CE%B9%CE%AC%CE%B4%CE%B7%CF%82%2C+%CE%93%CF%81%CE%B7%CE%B3%CF%8C%CF%81%CE%B9%CE%BF%CF%82%2C%29&skin=&rss=0&lang=el&ioffset=1&offset=1
Author Γρηγόριος Χιονιάδης(αρχικό κείμενο), Τρύφων Ε. Ευαγγελίδης

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