When was hipparchus born and died

Hipparchus family
When was hipparchus born
What did hipparchus discover

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Hipparchus – Biography and Facts

Life of Hipparchus

There isn’t much documented regarding Hipparchus’ early years because no records survive, and there’s little reason to suppose they were preserved in the first instance. He was born in 190 B.C., as far as we know. Nicaea is mentioned as his origin, and he did appear to start work as a trained astronomer in his 30s. His corpus of work would be more than spectacular, and it is widely believed that he really is the finest of all antiquity astronomers.

Hipparchus was the very first Greek astronomer to devise quantitative and precise models of the Sun and Moon’s movements. To do so, he drew on the observations and maybe mathematical tools amassed by the Babylonian Chaldeans over generations. He was equipped with a trigonometry table.

Discoveries, Theories and facts

1. The Purpose of the Chord

Hipparchus’ chord chart was centred on a circular object that was split into 360°, with each degree subdivided into 60 min. Toomer was able to extract this information by using Hipparchus’

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Biography

Little is known of Hipparchus's life, but he is known to have been born in Nicaea in Bithynia. The town of Nicaea is now called Iznik and is situated in north-western Turkey. Founded in the 4th Century BC, Nicaea lies on the eastern shore of Lake Iznik. Reasonably enough Hipparchus is often referred to as Hipparchus of Nicaea or Hipparchus of Bithynia and he is listed among the famous men of Bithynia by Strabo, the Greek geographer and historian who lived from about 64 BC to about 24 AD. There are coins from Nicaea which depict Hipparchus sitting looking at a globe and his image appears on coins minted under five different Roman emperors between 138 AD and 253 AD.

This seems to firmly place Hipparchus in Nicaea and indeed Ptolemy does describe Hipparchus as observing in Bithynia, and one would naturally assume that in fact he was observing in Nicaea. However, of the observations which are said to have been made by Hipparchus, some were made in the north of the island of Rhodes and several (although only one is definitely due to Hipparchus himself) were made in Al

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Hipparchus

2nd-century BC Greek astronomer, geographer and mathematician

This article is about the Greek astronomer. For other uses, see Hipparchus (disambiguation).

Hipparchus (; Greek: Ἵππαρχος, Hípparkhos; c. 190 – c. 120 BC) was a Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry,^[1] but is most famous for his incidental discovery of the precession of the equinoxes.^[2] Hipparchus was born in Nicaea, Bithynia, and probably died on the island of Rhodes, Greece. He is known to have been a working astronomer between 162 and 127 BC.^[3]

Hipparchus is considered the greatest ancient astronomical observer and, by some, the greatest overall astronomer of antiquity.^[4]^[5] He was the first whose quantitative and accurate models for the motion of the Sun and Moon survive. For this he certainly made use of the observations and perhaps the mathematical techniques accumulated over centuries by the Babylonians and by Meton of Athens (fifth century BC), Timocharis,