Almagest
E111570
The Almagest is an influential 2nd-century astronomical treatise by Claudius Ptolemy that systematically presents the geocentric model of the cosmos and provides mathematical tools for predicting planetary motions.
All labels observed (16)
How this entity was disambiguated
This entity first appeared as the object of triple T929288 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Almagest Context triple: [Ptolemaic system, describedIn, Almagest]
-
A.
De revolutionibus orbium coelestium
De revolutionibus orbium coelestium is Nicolaus Copernicus’s seminal 1543 work that introduced the heliocentric model of the universe, fundamentally transforming astronomy and natural philosophy.
-
B.
Harmonices Mundi
Harmonices Mundi is Johannes Kepler’s 1619 treatise in which he explores the mathematical harmony of the cosmos and formulates his third law of planetary motion.
-
C.
Rudolphine Tables
The Rudolphine Tables are a landmark 17th-century star catalog and set of astronomical tables compiled by Johannes Kepler, renowned for their unprecedented accuracy in predicting planetary positions.
-
D.
Mysterium Cosmographicum
Mysterium Cosmographicum is Johannes Kepler’s early astronomical treatise in which he proposes a geometric model of the solar system based on nested Platonic solids to explain the spacing of the planets.
-
E.
Epitome Astronomiae Copernicanae
Epitome Astronomiae Copernicanae is Johannes Kepler’s influential early-17th-century astronomy textbook that systematically presented and expanded Copernican heliocentrism using Kepler’s own laws of planetary motion.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Almagest Target entity description: The Almagest is an influential 2nd-century astronomical treatise by Claudius Ptolemy that systematically presents the geocentric model of the cosmos and provides mathematical tools for predicting planetary motions.
-
A.
De revolutionibus orbium coelestium
De revolutionibus orbium coelestium is Nicolaus Copernicus’s seminal 1543 work that introduced the heliocentric model of the universe, fundamentally transforming astronomy and natural philosophy.
-
B.
Harmonices Mundi
Harmonices Mundi is Johannes Kepler’s 1619 treatise in which he explores the mathematical harmony of the cosmos and formulates his third law of planetary motion.
-
C.
Rudolphine Tables
The Rudolphine Tables are a landmark 17th-century star catalog and set of astronomical tables compiled by Johannes Kepler, renowned for their unprecedented accuracy in predicting planetary positions.
-
D.
Mysterium Cosmographicum
Mysterium Cosmographicum is Johannes Kepler’s early astronomical treatise in which he proposes a geometric model of the solar system based on nested Platonic solids to explain the spacing of the planets.
-
E.
Epitome Astronomiae Copernicanae
Epitome Astronomiae Copernicanae is Johannes Kepler’s influential early-17th-century astronomy textbook that systematically presented and expanded Copernican heliocentrism using Kepler’s own laws of planetary motion.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
ancient Greek text
ⓘ
astronomical treatise ⓘ scientific work ⓘ |
| alsoKnownAs |
Mathematical Syntaxis
ⓘ
linked to:
Mathematike Syntaxis
Megale Syntaxis ⓘ |
| arabicTitle |
al-Majisti
ⓘ
linked to:
Almagest
|
| author |
Claudius Ptolemy
ⓘ
linked to:
Claudius Ptolemaeus
|
| basisFor | Ptolemaic system ⓘ |
| contains | star catalog of constellations ⓘ |
| cosmologicalModel | Earth-centered universe ⓘ |
| covers |
Moon
ⓘ
Sun ⓘ fixed stars ⓘ planets ⓘ |
| describes |
geocentric model of the universe
ⓘ
planetary motions ⓘ |
| era | Hellenistic astronomy ⓘ |
| explains |
deferents
ⓘ
eccentrics ⓘ epicycles ⓘ equant point ⓘ |
| geocentric | true ⓘ |
| historicalImportance | foundational text of pre-Copernican astronomy ⓘ |
| includes |
precession of the equinoxes
ⓘ
theory of lunar motion ⓘ theory of planetary latitudes ⓘ theory of solar motion ⓘ |
| influenced |
Renaissance astronomy
ⓘ
medieval European astronomy ⓘ medieval Islamic astronomy ⓘ |
| influencedBy | Hipparchus ⓘ |
| mainSubject |
astronomy
ⓘ
geocentric cosmology ⓘ |
| originalLanguage | Ancient Greek ⓘ |
| originalTitle | Mathematike Syntaxis ⓘ |
| provides |
mathematical models for planetary motion
ⓘ
star catalog ⓘ trigonometric tables ⓘ |
| publicationCentury | 2nd century ⓘ |
| regionOfInfluence |
Byzantine Empire
ⓘ
Islamic world ⓘ Latin Europe ⓘ |
| structure | 13 books ⓘ |
| titleMeaning | The Greatest ⓘ |
| translatedInto |
Arabic
ⓘ
Latin ⓘ |
| usedUntilCentury | 16th century ⓘ |
| uses |
chord function
ⓘ
spherical geometry ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Almagest Description of subject: The Almagest is an influential 2nd-century astronomical treatise by Claudius Ptolemy that systematically presents the geocentric model of the cosmos and provides mathematical tools for predicting planetary motions.
Referenced by (62)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Almagest
linked to: Almagest
linked to: Almagest
subject linked to:
Book III
linked to: Almagest
linked to: Almagest
linked to: Almagest
linked to: Almagest
linked to: Almagest
subject linked to:
Harmonics
subject linked to:
Optics
linked to: Almagest
linked to: Almagest
subject linked to:
Al-Battani's Zij al-Sabi
linked to: Almagest
linked to: Almagest
linked to: Almagest
subject linked to:
Cassiopeia from Greek mythology
linked to: Almagest
linked to: Almagest
linked to: Almagest
linked to: Almagest
linked to: Almagest
linked to: Almagest
linked to: Almagest
subject linked to:
Cassiopeia (queen of Aethiopia)
linked to: Almagest