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gptkbp:instanceOf
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gptkb:geologist
gptkb:mathematician
Greek astronomer
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gptkbp:birthDate
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c. 190 BC
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gptkbp:birthPlace
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gptkb:Nicaea
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gptkbp:catalogue
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about 850 stars
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gptkbp:contribution
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discovery of precession
division of a circle into 360 degrees
first trigonometric table
measurement of the distance to the Moon
methods for predicting solar and lunar eclipses
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gptkbp:deathDate
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c. 120 BC
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gptkbp:deathPlace
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gptkb:Rhodes
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gptkbp:era
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gptkb:Hellenistic_period
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gptkbp:field
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gptkb:astronomy
gptkb:mathematics
geography
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https://www.w3.org/2000/01/rdf-schema#label
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Hipparchus of Nicaea
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gptkbp:influenced
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gptkb:Ptolemy
gptkb:Claudius_Ptolemaeus
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gptkbp:knownFor
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gptkb:star
discovering precession of the equinoxes
founding trigonometry
improving astronomical instruments
solar and lunar theories
calculating the length of the year
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gptkbp:language
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gptkb:Ancient_Greek
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gptkbp:legacy
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regarded as one of the greatest astronomers of antiquity
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gptkbp:nationality
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gptkb:Ancient_Greek
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gptkbp:notableWork
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gptkb:star
gptkb:Commentary_on_the_Phaenomena_of_Eudoxus_and_Aratus
gptkb:On_the_Length_of_the_Year
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gptkbp:officeLocation
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gptkb:Rhodes
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gptkbp:usedFor
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Babylonian astronomical data
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gptkbp:bfsParent
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gptkb:Hipparchus_crater
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gptkbp:bfsLayer
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6
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