यूनानी खगोलविद और गणितज्ञ, जिन्होंने विषुव के पूर्ववर्ती की खोज की और पहली ज्ञात स्टार चार्ट बनाया और कहा कि त्रिकोणमिति (दूसरी शताब्दी ईसा पूर्व) का आविष्कार किया है

hipparchus's Usage Examples:

The city is supposed to have been surrounded by a wall before the time of Solon, the existence of which may be deduced from Thucydides' account of the assassination of Hipparchus (vi.

The problem of determining an orbit may be regarded as coeval with Hipparchus, who, it is supposed, found the moving positions of the apogee and perigee of the moon's orbit.

The following is a list of persons who suffered ostracism: - Hipparchus (488); Megacles (487), Xanthippus (485), Aristides (483), Themistocles (471?); Cimon (461?) Thucydides, son of Melesias (444), Damon, Hyperbolus (417) and possibly Cleisthenes himself (q.v.).

It is an extraordinary fact that, if ostracism was introduced in 598 B.C. for the purpose of expelling Hipparchus it was not till twenty years later that he was condemned.

By a former marriage he already had two sons, Hippias and Hipparchus, now growing up, and in his first tyranny or his first exile he married an Argive, Timonassa, by whom he had two other sons Iophon and Hegesistratus, the latter of whom is said to be identical with Thessalus (Ath.

Eratosthenes (276-196 B.C.) used most probably a solstitial armilla for measuring the obliquity of the ecliptic. Hipparchus (160-125 B.C.) probably used an armillary sphere of four rings.

He had before him the results of Eratosthenes, Hipparchus and Posidonius.

list of ostracized persons, the first of whom was a certain Hipparchus of the Peisistratid family (488 B.C.).

He was succeeded by his sons Hippias and Hipparchus, by whom the tyranny was in various ways brought into disrepute.

His geography was based more immediately on the work of his predecessor, Marinus of Tyre, and on that of Hipparchus, the follower and critic of Eratosthenes.

hipparchus's Meaning':

Greek astronomer and mathematician who discovered the precession of the equinoxes and made the first known star chart and is said to have invented trigonometry (second century BC