Hipparchus

American  

[hi-pahr-kuhs] / hɪˈpɑr kəs /

noun

1. died 514 b.c., tyrant of Athens 527–514.

2. c190–c125 b.c., Greek astronomer.

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Hipparchus ¹ British  

/ hɪˈpɑːkəs /

noun

1. a large crater in the SW quadrant of the moon, about 130 kilometres in diameter

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Hipparchus ² British  

/ hɪˈpɑːkəs /

noun

1. 2nd century _bc , Greek astronomer. He discovered the precession of the equinoxes, calculated the length of the solar year, and developed trigonometry

2. died 514 _bc , tyrant of Athens (527–514)

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Hipparchus Scientific  

/ hĭ-pär′kəs /

1. 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.

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Example Sentences

See Examples For:

Hipparchus

The discovery “enriches our picture” of Hipparchus, says Evans.

From Scientific American ● Oct. 20, 2022

Hipparchus was the pivotal figure responsible for “turning astronomy into a predictive science”, agrees Ossendrijver.

From Scientific American ● Oct. 20, 2022

With Hipparchus, this tradition merged with the Greek geometric approach, says Evans, and “modern astronomy really begins”.

From Scientific American ● Oct. 20, 2022

Today, it is our main source of information about the work of Hipparchus and other Greek astronomers.

From Textbooks ● Oct. 13, 2016

The figures, from left to right, are the astronomers Hipparchus, Copernicus, an anonymous ancient observer, Brahe and Ptolemy, each surrounded by symbols of his work.

From "The Invention of Science" by David Wootton