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Hipparchus

(c. 190—120 bc) Greek astronomer and geographer

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Apollinarius

Apollinarius  

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(RE ‘Apollinaris’ 12),astronomer (fl. ?1st cent. ad). From references in Galen, Vettius Valens, and others, he appears to have been one of the most important figures in Greek astronomy ...
Apollonius of Perga

Apollonius of Perga  

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(c.262 bc–c.190 bc) Greek mathematicianApollonius moved from his birthplace Perga (now in Turkey) to study in the Egyptian city of Alexandria, possibly under pupils of Euclid. Later he taught in ...
Aratus

Aratus  

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Greek poet, c.315 to before 240 bc. Born in Cilicia, he studied at Athens, where he imbibed Stoicism from Zeno (2) and was introduced to Antigonus Gonatas, king of Macedon, who invited him to the ...
astronomical instruments

astronomical instruments  

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Although the introduction of an astronomical instrument (the gnomon, an upright stick for measuring shadow-lengths) is credited to Anaximander in the 6th cent. bc, reliable information on the form of ...
Eratosthenes

Eratosthenes  

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(c.276–c.194 bc)Greekwriter on many subjects, born in modern Libya. He made the first known calculation of the Earth's circumference that was based on a scientifically sound method. According to ...
Hipparchus

Hipparchus (3) (fl. second half of 2nd cent. bc)(astronomer)   Reference library

G. J. Toomer and Alexander Jones

The Oxford Classical Dictionary (4 ed.)

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Subject Reference
Current Version:
2012
Subject:
Classical studies, History
Length:
686 words

Born at *Nicaea (1) in Bithynia, he spent much of his life in Rhodes; his recorded observations range from 147 to 127. His only extant work, the ...

Hipparchus

Hipparchus   Quick reference

G. J. Toomer

Who's Who in the Classical World

Reference type:
Subject Reference
Current Version:
2003
Subject:
Classical studies, History
Length:
539 words
astronomer (fl. second half of 2nd cent. bc). Born at Nicaea in Bithynia, he spent much of his life in Rhodes; his recorded observations range from 147 to 127. His only extant work, the ... More
Pappus

Pappus  

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(fl. ad 320), mathematical commentator. The most important of his surviving works is Sunagōgē (Collection), a compilation (probably made after his death) in eight books of eight originally separate ...
Ptolemy

Ptolemy  

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(2nd century),Greek astronomer and geographer. His teachings had enormous influence on medieval thought, the geocentric view of the cosmos (the Ptolemaic system outlined in his major work Almagest) ...
scholia

scholia  

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Are notes on a text, normally substantial sets of explanatory and critical notes written in the margin or between the lines of manuscripts. Many of them go back to ancient commentaries (which might ...
Taprobane

Taprobane  

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Ancient names for Sri Lanka (Ceylon). Mentioned by Onesicritus, Megasthenes, Eratosthenes, Hipparchus (3), and Ptolemy (4), as a large island south of India, twenty days' sail from the mouth of ...
time-reckoning

time-reckoning  

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Ancient culture knew a range of expedients for dividing the twenty-four hours of the day, for marking the succession of days in the month or year, and for dating important ...
Timocharis

Timocharis  

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(RE 1),astronomer at Alexandria (1), made observations between 295 and 272 bc reported by Ptolemy (4). These record positions of the moon and Venus with respect to fixed stars. ...

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