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190 BC - 120 BC

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Hipparchus (; Greek: Ἵππαρχος, Hipparkhos; c. 190 – c. 120 BC) was a Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry, but is most famous for his incidental discovery of the precession of the equinoxes. Hipparchus was born in Nicaea, Bithynia, and probably died on the island of Rhodes, Greece. Read more on Wikipedia

Since 2007, the English Wikipedia page of Hipparchus has received more than 1,056,832 page views. His biography is available in 71 different languages on Wikipedia (down from 72 in 2019). Hipparchus is the 12th most popular astronomer, the 69th most popular biography from Turkey (down from 53rd in 2019) and the most popular Turkish Astronomer.

Hipparchus is most famous for his discovery of the precession of the equinoxes.

Memorability Metrics

  • 1.1M

    Page Views (PV)

  • 74.29

    Historical Popularity Index (HPI)

  • 71

    Languages Editions (L)

  • 10.94

    Effective Languages (L*)

  • 3.52

    Coefficient of Variation (CV)

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Among astronomers, Hipparchus ranks 12 out of 531Before him are Tycho Brahe, Anders Celsius, William Herschel, Aristarchus of Samos, Edwin Hubble, and Ulugh Beg. After him are Ole Rømer, Ja'far al-Sadiq, Carl Sagan, Giovanni Domenico Cassini, Aryabhata, and Neil deGrasse Tyson.

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Among people born in 190 BC, Hipparchus ranks 1After him are Menander I, Lucius Mummius Achaicus, Seleucus of Seleucia, Servius Sulpicius Galba, Alexander II Zabinas, Julia, Phraates I, Orodes I of Parthia, and Hypsicles. Among people deceased in 120 BC, Hipparchus ranks 1After him are Mithridates V of Pontus, Hypsicles, and Lucius Coelius Antipater.

Others Born in 190 BC

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In Turkey

Among people born in Turkey, Hipparchus ranks 69 out of 1,301Before him are Abdulmejid I (1823), Selim III (1761), Mahmud I (1696), Mithridates VI of Pontus (-132), Aspasia (-470), and Anaximenes of Miletus (-585). After him are Rachel (-3500), Herostratus (-301), Osman III (1699), Ibn Taymiyyah (1263), Mustafa III (1717), and Murad V (1840).


Among astronomers born in Turkey, Hipparchus ranks 1After him are E. M. Antoniadi (1870), Walter Sydney Adams (1876), Cleomedes (110), Cleostratus (-520), Dilhan Eryurt (1926), Janet Akyüz Mattei (1943), and Paris Pişmiş (1911).