A biography of eratosthenes

See CircumnavigationArctic explorationand History of Antarctica. Some claim Eratosthenes used the Olympic stade of Eratosthenes studied at Alexandria and for some years in Athens. He championed scientific inquiry. The spherical shape of the Earth causes the Sun to rise and set at different times in different places, and different locations get different amounts of sunlight each day.

This notion was, obviously, disproved at a later point in human history. He was nicknamed Beta because he was great at many things and tried to get his hands on every bit of information but never achieved the highest rank in anything; Strabo accounts Eratosthenes as a mathematician among geographers and a geographer among mathematicians.

He produced an improved map of the world, as well as developed a method for discovering prime numbers, known today as the Sieve of Eratosthenes. Starting with the conquest of Troy, he worked to pin down the dates of important political and literary happenings.

A year later, he committed suicide by starving himself to death. The distance Eusebius quotes for the moon is much too low aboutkm ; Eratosthenes should have been able to be more accurate than this since he knew the size of the earth and Aristarchos of Samos had already found the ratio of the moon's distance to the size of the earth.

But a phone call from Richmond to San Francisco at sunset will reveal that there are still three hours of daylight left in California. Technology[ edit ] Observation of Foucault pendulumspopular in science museums around the world, demonstrate both that the world is spherical and that it rotates not that the stars are rotating around it.

He knew that on the summer solstice at local noon in the town of Syene on the Tropic of Cancer, the sun would appear at the zenith, directly overhead. These methods, of which Archimedes was a master, are the standard procedure in all his works on higher geometry that deal with proving results about areas and volumes.

See Article History Alternative Title: This must have proven to be a serious impediment to his scholarly work, discouraging him greatly.

Stars like the Sun are also spheroidal due to gravity's effects on their plasmawhich is a free-flowing fluid.

Eratosthenes

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.

The ocean, incidentally, was infinite. The second book is a mathematical tour de force unmatched in antiquity and rarely equaled since.

It is known, however, that Thales had traveled early in life to Egypt and Babylon.

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He was a true polymath. Ongoing stellar fusion is a much greater source of heat for stars compared to the initial heat released during formation. Eratosthenes was a mathematician and astronomer from Greek antiquity. His work helped lay the foundation for many of the brilliant advanced concepts in math and science in the modern era.

He also served as a distinguished and innovative geographer.

Eratosthenes of Cyrene

Dec 21,  · Eratosthenes was a mathematician from ancient Greece. He was also active in the fields of astronomy, geography, music, and poetry. Eratosthenes spent most of his career at the world-renowned Library of omgmachines2018.com: BC, Alexandria. Marie Curie discovered two new chemical elements – radium and polonium.

She carried out the first research into the treatment of tumors with radiation, and she was the founder of the Curie Institutes, which are important medical research centers. Eratosthenes, in full Eratosthenes of Cyrene, (born c. bce, Cyrene, Libya—died c. bce, Alexandria, Egypt), Greek scientific writer, astronomer, and poet, who made the first measurement of the size of Earth for which any details are known.

Eratosthenes was one of the foremost scholars of his time and produced works (of which only fragments remain) on geography, mathematics, philosophy, chronology, literary criticism, and grammar as well as writing poetry. Eratosthenes lived in Alexandria, Egypt, part of Ancient Greece.

He was born in about BC and died in about BC. He was born in about BC and died in about BC. Archimedes lived in Syracuse, Sicily, part of Ancient Greece.

Archimedes A biography of eratosthenes
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Eratosthenes | Greek scientist | omgmachines2018.com