History of Astronomy |
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Page 16
... centre of the world . Nicetas , Heraclides , and Ecphantes supposed the earth to revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary deductive methods adopted by the ancient ...
... centre of the world . Nicetas , Heraclides , and Ecphantes supposed the earth to revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary deductive methods adopted by the ancient ...
Page 18
... centre , about which the sun moves uniformly , is situated a little distance from the fixed earth . He called this point the excentric . The line from the earth to the excentric " was called the line of apses . A circle having this centre ...
... centre , about which the sun moves uniformly , is situated a little distance from the fixed earth . He called this point the excentric . The line from the earth to the excentric " was called the line of apses . A circle having this centre ...
Page 21
... centre * Πληιάδας τ ' ἐσορῶντε καὶ ὀψὲ δύοντα βοώτην " Αρκτον θ ' , ἣν καὶ ἅμαξαν ἐπίκλησιν καλέουσιν , “ Η τ ̓ αὐτοῦ στρέφεται καὶ τ ̓ Ωρίωνα δοκεύει , Οἴη δ ̓ ἄμμορος ἐστι λοετρῶν Ωκεανοῖο . " The Pleiades and Boötes that setteth late ...
... centre * Πληιάδας τ ' ἐσορῶντε καὶ ὀψὲ δύοντα βοώτην " Αρκτον θ ' , ἣν καὶ ἅμαξαν ἐπίκλησιν καλέουσιν , “ Η τ ̓ αὐτοῦ στρέφεται καὶ τ ̓ Ωρίωνα δοκεύει , Οἴη δ ̓ ἄμμορος ἐστι λοετρῶν Ωκεανοῖο . " The Pleiades and Boötes that setteth late ...
Page 22
... centre revolves round the earth on the primary circle ( the deferent ) , at a uniform rate round the excentric . Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a bar passing through the sun , and to be ...
... centre revolves round the earth on the primary circle ( the deferent ) , at a uniform rate round the excentric . Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a bar passing through the sun , and to be ...
Page 23
George Forbes. It did not occur to Ptolemy to place the centres of the epicycles of Mercury and Venus at the sun , and ... centre of the deferent , and the position of the 2 For definition see p . 22 . 3 For definition see p . 18 . 2 Ibid ...
George Forbes. It did not occur to Ptolemy to place the centres of the epicycles of Mercury and Venus at the sun , and ... centre of the deferent , and the position of the 2 For definition see p . 22 . 3 For definition see p . 18 . 2 Ibid ...
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accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later LIBRARIES light lunar Mars mass mathematical mean measured method miles moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed SIGILLUM solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY VERITAS