Planetary Hypotheses

E200664

Planetary Hypotheses is an ancient astronomical treatise by Ptolemy that elaborates a geometric, three-dimensional model of the cosmos to explain the motions and distances of the planets.

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Statements (46)

Predicate Object
instanceOf ancient astronomical treatise
work by Claudius Ptolemy
aimsTo construct a physical model corresponding to mathematical schemes
explain observed planetary motions
approximateDate 2nd century
assumes finite universe bounded by the sphere of fixed stars
uniform circular motion
author Claudius Ptolemy
linked to: Claudius Ptolemaeus
buildsOn Almagest
category Ptolemaic astronomy
ancient Greek astronomical works
cosmologicalAssumption Earth at the center of the universe
planets attached to nested spheres
cosmologicalModel geocentric model
describes geometric model of the cosmos
planetary distances
planetary motions
three-dimensional planetary models
field astronomy
focusesOn mathematical modeling of planetary orbits
three-dimensional realization of Ptolemaic system
genre mathematical astronomy
hasPart Book I of Planetary Hypotheses
Book II of Planetary Hypotheses
hasSubject cosmic distances
physical realization of mathematical models
planetary order
historicalPeriod Hellenistic astronomy
influenced medieval European astronomy
medieval Islamic astronomy
inUniverseModel Moon as the nearest celestial body to Earth
Sun as a planet orbiting Earth
language Ancient Greek
originallyWrittenIn Greek language
places fixed stars on outermost sphere
preservedIn Arabic translation
Latin translation
provides numerical values for planetary distances
numerical values for sizes of planetary spheres
relatedWork Almagest
topic epicycles and deferents
geocentric cosmology
ordering of planetary spheres
sizes of celestial spheres
uses geometric constructions
spherical geometry

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Referenced by (3)

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

Claudius Ptolemaeus notableWork Planetary Hypotheses
Planetary Hypotheses hasPart Book I of Planetary Hypotheses
linked to: Planetary Hypotheses
Planetary Hypotheses hasPart Book II of Planetary Hypotheses
linked to: Planetary Hypotheses