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Seleucus of Seleucia ((ギリシア語:Σέλευκος) ''Seleukos''; born c. 190 BC; fl. c. 150 BC) was a Hellenistic astronomer and philosopher.〔Greek astronomer: (The SAO/NASA Astrophysics Data System (ADS) ): (ScienceWorld ): 〕 Coming from Seleucia on the Tigris, Mesopotamia, the capital of the Seleucid Empire, or, alternatively, Seleukia on the Erythraean Sea,〔: 〕 he is best known as a proponent of heliocentrism〔(Index of Ancient Greek Philosophers-Scientists )〕〔(Seleucus of Seleucia (c. 190 BC–?) ), The SAO/NASA Astrophysics Data System (ADS)〕〔(Seleucus of Seleucia (ca. 190–unknown BC) ), ScienceWorld〕 and for his theory of the origin of tides. ==Heliocentric theory== Teaching around 150 BC, he is known to have been a follower of the heliocentric theory of Aristarchus of Samos, which stated that the Earth rotated around its own axis which in turn revolved around the Sun.〔Russell, Bertrand — History of Western Philosophy (2004) – p. 215〕〔We do not know other names of ancient astronomers or scientists who supported the heliocentric system: Hipparchus and later Ptolemy contributed to the success of the geocentric system; however, in the writings of Plutarch and Sextus Empiricus we read of "the followers of Aristarchus", thus it is probable that other people we do not know of adhered to the heliocentric view.〕 According to Plutarch, Seleucus was the first to demonstrate the heliocentric system through reasoning, but it is not known what arguments he used. According to Bartel Leendert van der Waerden, Seleucus may have constructed his heliocentric theory by determining the constants of a geometric model and by developing methods to compute planetary positions using this model, as Nicolaus Copernicus later did in the 16th century. He may have used trigonometric methods that were available in his time, as he was a contemporary of Hipparchus. Since the time of Heraclides Ponticus (387 BC–312 BC), the inferior planets Mercury and Venus have been at times named ''solar planets'', as their positions diverge from the Sun by only a small angle. According to the Greek geographer Strabo, Seleucus was also the first to assume the universe to be infinite.〔 None of his original writing or Greek translations have survived, though a fragment of his work has survived only in Arabic translation, which was later referred to by the Persian philosopher Muhammad ibn Zakariya al-Razi (865–925). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Seleucus of Seleucia」の詳細全文を読む スポンサード リンク
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