Other details of what Eratosthenes wrote in Platonicus are given by Theon of Smyrna. Posidonius was celebrated as a polymath throughout the Graeco-Roman world because he came near to mastering all the knowledge of his time, similar to Aristotle and Eratosthenes. Log in to post comments By Wow not verified on 21 Sep permalink "if the sun were much closer to the earth, it's light rays would not be parallel and Eratosthenes' observations would be consistent with a flat earth.
Given an estimate of the distance between the two cities, he was able to calculate the circumference of Earth, obtainingstadia. He observed that a given star could be seen just on the horizon at Rhodes. And so he enlisted the talents of a professional pacer to determine the exact distance from the well in Syene to the tower in Alexandria.
He then measured the Sun's angle of elevation at noon in Alexandria by using a vertical rod, known as a gnomonand measuring the length of its shadow on the ground. It was said that these were copied so accurately that it was impossible to tell if the library had returned the original or the copy.
He lived in the city of Alexandria in the Roman province of Egypt, wrote in Koine Greek, beyond that, few reliable details of his life are known. The calculation is based on the assumption that the Earth is spherical and that the Sun is so far away that its rays can be taken as parallel.
The paths of the planets was carefully observed by Tycho Brahe in the late s. After study in Alexandria and Athens, Eratosthenes settled in Alexandria about bce and became director of the great library there.
Either way, he probably hired someone or enlisted a slave to accomplish the task. It can thus be used to identify stars or planets, to determine local latitude given local time and vice versa, to survey and it was used in classical antiquity, the Islamic Golden Age, the European Middle Ages and the Renaissance for all these purposes.
After he had established himself in Rhodes, Posidonius made one or more journeys traveling throughout the Roman world and he traveled in Greece, Hispania, Italy, Sicily, Dalmatia, Gaul, Liguria, North Africa, and on the eastern shores of the Adriatic.
That light rays emanating from the Sun are parallel. This was a breakthrough, and can be considered the beginning of geography. He likewise had the care of furnishing the troops with wood and straw, as well as the rams, onagri, balistae, at various locations described by Vitruvius, battles and sieges occurred.
Bleen not verified on 22 Sep permalink Wow, actually if the sun were close enough to produce Eratosthenes' results, the change the angle of the sun's rays w. To be sure, Eratosthenes also invented a way of measuring longitude as you say, but as I understand it, it wasn't very accurate at all.
It was widely used throughout the Muslim world, chiefly as an aid to navigation and as a way of finding the Qibla, the first person credited with building the astrolabe in the Islamic world is reportedly the 8th-century mathematician Muhammad al-Fazari.
The exact size of the stadion he used is no longer known the common Attic stadion was about mbut it is generally believed that Eratosthenes' value corresponds to between 39, km and 46, km.
The exact size of the stadion he used is frequently argued.Eratosthenes – Eratosthenes of Cyrene was a Greek mathematician, geographer, poet, astronomer, and music theorist.
He was a man of learning, becoming the librarian at the Library of Alexandria. He was a man of learning, becoming the librarian at the Library of Alexandria. Biography of Eratosthenes ( BC BC) Eratosthenes of Cyrene.
Born: BC in Cyrene, Eratosthenes also measured the distance to the sun as , stadia and the distance to the Moon asstadia. Ptolemy tells us that Eratosthenes measured the tilt of the Earth's axis with great accuracy obtaining the value of 11 / 83 of.
Eratosthenes proposed a simple algorithm for finding prime urgenzaspurghi.com algorithm is known in mathematics as the Sieve of Eratosthenes.
In mathematics, the sieve of Eratosthenes (Greek: κόσκινον Ἐρατοσθένους), one of a number of prime number sieves, is a simple, ancient algorithm for finding all prime numbers up to any given urgenzaspurghi.com: BC, Alexandria. Jun 21, · Back in ancient times, “Just subtract this angle from your latitude and you’ve measured the Earth’s axial tilt!” The tilt of the earths axis is degrees, not as you tried.
A Biography of Eratosthenes the Ancient Scientist That Measured The Tilt of the Earth's Axis. When Columbus lived. people thought that the earth was flat They believed the Atlantic Ocean to be filled with monsters large a biography of eratosthenes the ancient scientist that measured the tilt of the earths axis enough to devour their.Download