What is the contribution of Eratosthenes in ancient geography?

What is the contribution of Eratosthenes in ancient geography?

Eratosthenes made major contributions to geography. He sketched, quite accurately, the route of the Nile to Khartoum, showing the two Ethiopian tributaries. He also suggested that lakes were the source of the river.

What is the contribution of Eratosthenes in mathematics?

He has written works on geography, philosophy, history, astronomy, mathematics, and literary criticism. One of Eratosthenes’ contributions to mathematics was his measurement of the Earth. He calculated the circumference of the Earth to be about 252,000 stadi which is equal to about 24,662 miles.

What is are the contributions of Eratosthenes in the field of social science?

Eratosthenes’ most famous contribution to science was his calculation of the circumference of the Earth, which he completed while working on the second volume of his “Geography.”

What is the contribution of eudoxus?

Eudoxus’ major contribution to mathematics are his “method of exhaustion” and his “theory of proportion”, essentially the introduction of irrational numbers. Before Eudoxus mathematicians could deal with fractions (such as 7/13), known as rational numbers.

What was Eratosthenes greatest achievement?

Quick Guide – Eratosthenes’ Greatest Achievements In about 240 BC Eratosthenes calculated Earth’s size with good accuracy. This was a moment of triumph for the human intellect: first to recognize our planet is a sphere, then to use the powers of observation, deduction, and mathematics to calculate its size.

What impact did Eratosthenes of Cyrene have on science?

Eratosthenes made several important contributions to mathematics and science, and was a friend of Archimedes. Around 255 BC, he invented the armillary sphere. In On the Circular Motions of the Celestial Bodies, Cleomedes credited him with having calculated the Earth’s circumference around 240 BC, with a high precision.

What did Eratosthenes do to help the world?

The contributions of eratosthenes. I. Eratosthenes made maps, both of the world and sky and is said to have made a map that includes 675 stars. II. He worked in geography to try to figure out why the Nile river had such a regular flood pattern, and hypothesized that it was because of heavy rain upstream. III.

What did Eratosthenes calculate the diameter of the Sun?

Eratosthenes also calculated the Sun’s diameter. According to Macrobious, Eratosthenes made the diameter of the Sun to be about 27 times that of the Earth. The actual figure is approximately 109 times. During his time at the Library of Alexandria, Eratosthenes devised a calendar using his predictions about the ecliptic of the Earth.

When did Eratosthenes become a librarian at Alexandria?

On the death of Callimachus in about 240 BC, Eratosthenes became the third librarian at Alexandria, in the library in a temple of the Muses called the Mouseion. The library is said to have contained hundreds of thousands of papyrus and vellum scrolls.

What is the definition of 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 limit.