Hipparchus

E112015

Hipparchus was an ancient Greek astronomer and mathematician renowned for founding trigonometry and creating one of the first comprehensive models of the motions of the Sun and Moon.

All labels observed (3)

Label Occurrences
Hipparchus canonical 12
Hipparchus of Nicaea 2
works of Hipparchus 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf ancient Greek astronomer ⓘ
astrologer ⓘ
geographer ⓘ
human ⓘ
mathematician ⓘ
approximateValue anomalistic month ⓘ
draconic month ⓘ
length of the tropical year ⓘ
lunar distance ⓘ
synodic month ⓘ
associatedWith Nicaea ⓘ
Rhodes ⓘ
birthDate circa 190 BC ⓘ
birthPlace Ancient Greece ⓘ
linked to: Greek Antiquity

Bithynia ⓘ
Nicaea ⓘ
deathDate circa 120 BC ⓘ
deathPlace Rhodes ⓘ
era Hellenistic period ⓘ
field astronomy ⓘ
geography ⓘ
mathematics ⓘ
trigonometry ⓘ
influenced Ptolemy ⓘ
linked to: Claudius Ptolemaeus

ancient Greek astronomy ⓘ
development of trigonometry ⓘ
knownFor creating a star catalog ⓘ
developing models of the motions of the Sun and Moon ⓘ
discovering precession of the equinoxes ⓘ
early use of chords in a circle ⓘ
founding trigonometry ⓘ
improving the accuracy of astronomical observations ⓘ
introduction of epicyclic and eccentric models ⓘ
systematic use of trigonometric tables ⓘ
use of Babylonian astronomical data ⓘ
legacy considered one of the greatest ancient astronomers ⓘ
laid foundations for Ptolemaic astronomy ⓘ
name Hipparchus of Nicaea ⓘ
linked to: Hipparchus
notableMethod comparison of his observations with earlier star catalogs ⓘ
geometrical models with epicycles and eccentrics ⓘ
use of a chord table for trigonometric calculations ⓘ
usedSource Babylonian astronomical records ⓘ
workOn eclipses ⓘ
geographical coordinates ⓘ
lunar theory ⓘ
solar theory ⓘ
star positions ⓘ

How these facts were elicited

Referenced by (15)

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

Ptolemaic system → influencedBy → Hipparchus ⓘ
Claudius Ptolemaeus → influencedBy → Hipparchus ⓘ
Almagest → influencedBy → Hipparchus ⓘ
Hipparchus → name → Hipparchus of Nicaea ⓘ
linked to: Hipparchus
Strabo → influencedBy → Hipparchus ⓘ
Eudoxus of Cnidus → influenced → Hipparchus ⓘ
Mathematike Syntaxis → precededBy → works of Hipparchus ⓘ
linked to: Hipparchus
Hipparcos → namedAfter → Hipparchus of Nicaea ⓘ
subject linked to: Hipparcos satellite
linked to: Hipparchus
NGC 884 → discoveredBy → Hipparchus ⓘ
Caldwell 14 → discoverer → Hipparchus ⓘ
NGC 869 → discoveredBy → Hipparchus ⓘ
Geographica → usesSources → Hipparchus ⓘ
Hellenistic science → hasKeyFigure → Hipparchus ⓘ