Hipparchus

GPTKB entity

Properties (45)
Predicate Object
gptkbp:instanceOf mathematician
astronomer
gptkbp:associatedWith gptkb:ancient_Greece
Hellenistic period
gptkbp:birthYear c._190_BC
gptkbp:bornIn gptkb:Nicaea
gptkbp:contributedTo geography
astrometry
gptkbp:createdBy the first known star catalog
gptkbp:deathYear c. 120 BC
gptkbp:developedBy lunar theory
solar theory
gptkbp:established the equinoxes' precession
https://www.w3.org/2000/01/rdf-schema#label Hipparchus
gptkbp:influenced gptkb:Ptolemy
gptkbp:influencedBy gptkb:Aristarchus_of_Samos
gptkbp:isAssociatedWith the development of the astrolabe
gptkbp:isConsidered the father of trigonometry
gptkbp:isInfluencedBy the development of astronomy
gptkbp:isKnownFor his accurate measurements
gptkbp:isMaintainedBy his contributions to geography
his contributions to mathematics
his contributions to the science of astronomy
gptkbp:isNotableFor his work on eclipses
his work on the length of the year
his work on the motion of the sun and moon
gptkbp:isRecognizedFor one of the greatest astronomers of antiquity
gptkbp:knownFor star catalog
developing trigonometry
precession of the equinoxes
gptkbp:research celestial mechanics
stellar motion
gptkbp:uses observational astronomy
gptkbp:wasA gptkb:philosopher
historian
scientist
cartographer
astrologer
mathematician and astronomer
pioneer in the field of astronomy
scholar_in_ancient_Greece
gptkbp:wasFoundedIn 2nd century BC
gptkbp:wrote gptkb:The_Great_Astronomical_Tables
On the Sizes and Distances of the Sun and Moon
Commentary on the Phenomena