Claudius Ptolemaeus

E40246

Claudius Ptolemaeus, commonly known as Ptolemy, was a Greco-Roman mathematician, astronomer, and geographer whose geocentric model of the universe and influential works like the Almagest shaped scientific thought for over a millennium.

All labels observed (4)

Label Occurrences
Ptolemy 42
Claudius Ptolemy 12
Claudius Ptolemaeus canonical 4

How this entity was disambiguated

Statements (51)

Predicate Object
instanceOf Greco-Roman scholar
astrologer
astronomer
geographer
human
mathematician
activeIn Alexandria
alsoKnownAs Ptolemaios
Claudius Ptolemaeus
surface form: Ptolemy

Ptolemaios
surface form: Κλαύδιος Πτολεμαῖος
birthPlace Alexandria
Byzantine Egypt
surface form: Roman Egypt
catalogued over 1,000 fixed stars
citizenship Roman Empire
compiled star catalogue in the Almagest
contributedTo trigonometry
developed geocentric model of the universe
era Roman Antiquity
surface form: Roman Imperial period
ethnicGroup Greek
fieldOfWork astrology
astronomy
geography
mathematics
music theory
optics
floruit 2nd century
c. 100–170 CE
influenced Nicolaus Copernicus
surface form: Claudius Copernicus

European Renaissance astronomy
Islamic astronomy
geography in the Middle Ages
medieval astronomy
influencedBy Hipparchus
introduced equant in planetary theory
languageOfWorkOrName Ancient Greek
name Claudius Ptolemaeus self-link
notableWork Almagest
Geographia
Harmonics
Mathematike Syntaxis
Optics
Planetary Hypotheses
Almagest
surface form: Tetrabiblos
proposed Earth-centered cosmology
systematized ancient Greek astronomy
ancient geographic knowledge
used chord tables
deferents in planetary theory
eccentrics in planetary theory
epicycles in planetary theory
workPeriod c. 127–151 CE

How these facts were elicited

Referenced by (59)

Full triples — surface form annotated when it differs from this entity's canonical label.

Pelasgiotis mentionedBy Claudius Ptolemaeus
this entity surface form: Ptolemy
Al-Battani influencedBy Claudius Ptolemaeus
this entity surface form: Ptolemy
Al-Farghani influencedBy Claudius Ptolemaeus
this entity surface form: Ptolemy
Hecatompylos mentionedBy Claudius Ptolemaeus
this entity surface form: Ptolemy
Hellenistic astronomy hasNotableAstronomer Claudius Ptolemaeus
this entity surface form: Claudius Ptolemy
Swenet mentionedBy Claudius Ptolemaeus
this entity surface form: Claudius Ptolemy
Ainianes mentionedBy Claudius Ptolemaeus
this entity surface form: Ptolemy
Perrhaebia mentionedBy Claudius Ptolemaeus
this entity surface form: Ptolemy
Vestinian mentionedBy Claudius Ptolemaeus
subject surface form: Vestinians
this entity surface form: Ptolemy