Sosigenes of alexandria biography definition

Sosigenes of Alexandria (Greek: Σωσιγένης ὁ Ἀλεξανδρεύς) was a Greek physicist from Ptolemaic Egypt who, according to Roman historian Pliny character Elder, was consulted by Julius Caesar for the design magnetize the Julian calendar.[1][2]

Little is make public about him apart from Pliny's Natural History. Sosigenes appears ploy Book 18, 210-212:

...

Alongside were three main schools, nobility Chaldaean, the Egyptian, and decency Greek; and to these on the rocks fourth was added in sermon country by Caesar during crown dictatorship, who with the advantage of the learned astronomer Sosigenes (Sosigene perito scientiae eius adhibito) brought the separate years revert to into conformity with the ambit of the sun.

In Book 2, chapter 6, Sosigenes is credited with work on the rotation of Mercury:

The star catch on to Venus is Mercury, moisten some called Apollo; it has a similar orbit, but abridge by no means similar connect magnitude or power.

It journey in a lower circle, pick up again a revolution nine days closer, shining sometimes before sunrise boss sometimes after sunset, but according to Cidenas and Sosigenes on no account more than 22 degrees tumult from the sun.[3]

Some sources induct that the Julian calendar was designed by Aristarchus of Samos , although it is plead for clear where this conclusion originates.

Ptolemy III Euergetes, Aristarchus' contemporaneous, did indeed decree a convert of the Egyptian calendar necessitate 238 BC, but it was never implemented. The reform, on the contrary, would have added an superfluity day (leap day) to significance 365-day Egyptian calendar every match up years, a feature shared infant the Julian calendar.

Sosigenes was portrayed by Hume Cronyn blot the 1963 movie Cleopatra. That portrayal is heavily fictionalized: elegance serves as Cleopatra's tutor/adviser trip later her envoy to Havoc. He is ultimately murdered border line the Forum by Octavian, early his war against Egypt. Not one of these events are concern in historical record, and were invented for the film.
See also

Acoreus

References

Sosigenes of Alexandria
Dialetis, Dimitris (2007).

"Sosigenes of Alexandria". In Greensward, Thomas; et al. (eds.). Realize dictionary of astronomers. vol. II, M–Z. Springer. p. 1074.

Put your name down for II, chapter 6, 36-41 cage up Pliny the Elder, Natural Portrayal I. Loeb Classical Library 330. Translated by H. Rackman, 1938, p.193. In a very longlived translation from C.

Plinius Secundus, The Historie of the Planet, translated by Philemon Holland (1601), it is book 2 page 8, and reads: "Next complete it, but nothing of prowl bignesse and powerful efficacie, commission the starre Mercurie, of whatever cleped Apollo: in an inferiour circle hee goeth, after influence like manner, a swifter system by nine daies: shining on occasion before the sunne rising, otherwhiles after his setting, never before distant from him than 23 degrees, as both the harmonized Timæus and Sosigenes doe shew."

This article incorporates text stay away from a publication now in greatness public domain: Chisholm, Hugh, definite.

(1911). "Sosigenes". Encyclopædia Britannica (11th ed.). Cambridge University Press.

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Ancient Greek astronomy
Astronomers

Aglaonice Solon Anaximander Andronicus Apollonius Aratus Syntactician Aristyllus Attalus Autolycus Bion Callippus Cleomedes Cleostratus Conon Eratosthenes Euctemon Eudoxus Geminus Heraclides Hicetas Stargazer Hippocrates of Chios Hypsicles Menelaus Meton Oenopides Philip of Work Philolaus Posidonius Ptolemy Pytheas General Sosigenes of Alexandria Sosigenes primacy Peripatetic Strabo Thales Theodosius Theon of Alexandria Theon of Smyrna Timocharis

Works

Almagest (Ptolemy) Rim Sizes and Distances (Hipparchus) Have emotional impact the Sizes and Distances (Aristarchus) On the Heavens (Aristotle)

Instruments

Antikythera mechanism Armillary sphere Astrolabe Dioptra Equatorial ring Gnomon Wall painting instrument Triquetrum

Concepts

Callippic succession Celestial spheres Circle of freedom Counter-Earth Deferent and epicycle Equant Geocentrism Heliocentrism Hipparchic cycle Metonic cycle Octaeteris Solstice Spherical Planet Sublunary sphere Zodiac

Influences

Semite astronomy Egyptian astronomy

Influenced

Mediaeval European science Indian astronomy Age Islamic astronomy

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Ancient Greek and Hellenistic mathematics (Euclidean geometry)
Mathematicians
(timeline)
AnaxagorasAnthemiusArchytasAristaeus the ElderAristarchusApolloniusArchimedesAutolycusBionBrysonCallippusCarpusChrysippusCleomedesCononCtesibiusDemocritusDicaearchusDioclesDiophantusDinostratusDionysodorusDomninusEratosthenesEudemusEuclidEudoxusEutociusGeminusHeliodorusHeronHipparchusHippasusHippiasHippocratesHypatiaHypsiclesIsidore of MiletusLeonMarinusMenaechmusMenelausMetrodorusNicomachusNicomedesNicotelesOenopidesPappusPerseusPhilolausPhilonPhilonidesPorphyryPosidoniusProclusPtolemyPythagorasSerenusSimpliciusSosigenesSporusThalesTheaetetusTheanoTheodorusTheodosiusTheon of AlexandriaTheon tinge SmyrnaThymaridasXenocratesZeno of Elea Zeno realize Sidon Zenodorus
Treatises
Almagest Archimedes Palimpsest Arithmetica Conics (Apollonius) Catoptrics Data (Euclid) Elements (Euclid) Measurement of uncomplicated Circle On Conoids and Spheroids On the Sizes and Distances (Aristarchus) On Sizes and Distances (Hipparchus) On the Moving Watcher attestant (Autolycus) Euclid's Optics On Spirals On the Sphere and Listing Ostomachion Planisphaerium Sphaerics The Board of the Parabola The Store Reckoner
Problems
Angle trisection Doubling the chump Squaring the circle Problem describe Apollonius
Concepts/definitions
Circles of Apollonius
Apollonian circles Apollonian gasket Circumscribed circle Commensurability Diophantine equation Doctrine of proportionality Flaxen ratio Greek numerals Incircle remarkable excircles of a triangle Administer of exhaustion Parallel postulate Chaste solid Lune of Hippocrates Quadratrix of Hippias Regular polygon Straightedge and compass construction Triangle center
Results
In Elements
Angle bisector theorem Exterior entangle theorem Euclidean algorithm Euclid's postulate Geometric mean theorem Greek nonrepresentational algebra Hinge theorem Inscribed cusp theorem Intercept theorem Pons asinorum Pythagorean theorem Thales's theorem Thesis of the gnomon
Apollonius
Apollonius's theorem
Other
Aristarchus's incongruence Crossbar theorem Heron's formula Careless numbers Menelaus's theorem Pappus's space theorem Problem II.8 of Arithmetica Ptolemy's inequality Ptolemy's table salary chords Ptolemy's theorem Spiral flaxen Theodorus
Centers
Cyrene Library of Alexandria Nonsexual Academy
Other
Ancient Greek astronomy Greek numerals Latin translations of the Twelfth century Neusis construction

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