Hipparchus

[ hi-pahr-kuhs ]

Phonetic (Standard)IPA

noun

Hipparchus

/ hɪˈpɑːkəs /

Hipparchus

/ hɪˈpɑːkəs /

Hipparchus2nd century bc2nd century bcMGreekSCIENCE: astronomer 2nd century bc , Greek astronomer. He discovered the precession of the equinoxes, calculated the length of the solar year, and developed trigonometry
Hipparchus514 bcMGreekAthenianPOLITICS: tyrant died 514 bc , tyrant of Athens (527–514)

Hipparchus

/ hĭ-pär′kəs /

Greek astronomer who mapped the positions of about 850 stars in the earliest known star chart (129 bce ). His observations of the heavens formed the basis of Ptolemy's Earth-centered model of the universe. He was also a pioneer of trigonometry.

And when he was unable to do that, Hipparchus would not pay down his silver, until he could make further inquiry.

This was the number of stars comprised in the Catalogue of Ptolemy, according to the system of Hipparchus.

Scientific method in the work of Hipparchus meant a very different thing from the scientific method of the Chaldeans.

One of the tyrants, Hipparchus, was very jealous of Harmodius, because the people loved him so much.

Statues were raised to Harmodius and Aristogeiton, who slew Hipparchus.

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