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- Gregory_Choniades abstract "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 and founded an astronomical academy at Trebizond. Choniades also served as Orthodox Bishop in Tabriz.Information about Choniades survives from some contemporary sources. In 1347, George Chrysococces (Chrysococcis) writes that "a certain Chioniades, who had been raised in Constantinople, fell in love with mathematics and other sciences. After he had mastered medicine, he wished to study astronomy; he was informed that, in order to satisfy his desire, he would have to go to Persia. He traveled to Trebizond, where he was given some assistance by the Emperor Alexios II of Trebizond, and thence proceeded to Persia itself, where he persuaded yet another Emperor to aid him. He eventually learned all that he wished to know, and returned to Trebizond, bearing away from Persia a number of astronomical texts which he translated into Greek."Sixteen of Choniades' letters have survived, which confirm that he received assistance from Alexios II and traveled to Persia. Choniades translated a number of Arabic and Persian works on mathematics and astronomy, including the astronomical tables of his teacher Shams ad-Din al-Bukhari, who had worked at the famous Maragheh observatory under the polymath Nasir al-Din al-Tusi. Choniades played an important role in transmitting several innovations from the Islamic world to Europe. These include the introduction of the universal latitude-independent astrolabe to Europe and a Greek description of the Tusi-couple, which would later have an influence on Copernican heliocentrism. Choniades also translated several Zij treatises into Greek, including the Persian Zij-i Ilkhani by al-Tusi and the Maragheh observatory as well as the Arabic Sinjaric Tables by Al-Khazini, an Islamic astronomer of Byzantine Greek descent.Choniades also visited Tabriz, at the time the Mongol capital, and served as Orthodox Bishop there. He seems to have been in Tabriz from 1295 to 1296 and returned to Constantinople. In 1302, he returned to Tabriz as Bishop. According to David Pingree, this may have been in connection with Andronikos II Palaiologos's attempt to form an alliance with Ghazan Khan in the summer of 1302.He died at Constantinople, probably in the second decade of the fourteenth century.".
- Gregory_Choniades deathDate "1302".
- Gregory_Choniades deathYear "1302".
- Gregory_Choniades wikiPageExternalLink Chioniades_BEA.htm.
- Gregory_Choniades wikiPageExternalLink Chioniades_BEA.pdf.
- Gregory_Choniades wikiPageExternalLink TheZijAs-sanjariOfGregoryChioniades.
- Gregory_Choniades wikiPageExternalLink rebyz_0766-5598_1980_num_38_1_2109.
- Gregory_Choniades wikiPageID "7006052".
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- Gregory_Choniades dateOfDeath "1302".
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- Gregory_Choniades name "Choniades, Gregory".
- Gregory_Choniades shortDescription "Byzantine Greek astronomer".
- Gregory_Choniades description "Byzantine Greek astronomer".
- Gregory_Choniades description "Byzantine Greek astronomer".
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- Gregory_Choniades subject Category:14th-century_astronomers.
- Gregory_Choniades subject Category:Byzantine_astronomers.
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- Gregory_Choniades subject Category:Byzantine_scientists.
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- Gregory_Choniades comment "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 and founded an astronomical academy at Trebizond. Choniades also served as Orthodox Bishop in Tabriz.Information about Choniades survives from some contemporary sources.".
- Gregory_Choniades label "Gregory Choniades".
- Gregory_Choniades label "Grégoire Choniadès".
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- Gregory_Choniades givenName "Gregory".
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- Gregory_Choniades name "Choniades, Gregory".
- Gregory_Choniades name "Gregory Choniades".
- Gregory_Choniades surname "Choniades".