This short speech has attracted a great deal of interest as much for its author's skilful presentation of argument and character, as for its details of athenian law and life euphiletos stands accused of the murder of eratosthenes, his wife's lover. Eratosthenes measures the earth in 240 bc history, science, math basic geometry for kids. Hipparchus was a greek astronomer and mathematician who discovered the precession of the equinoxes, calculated the length of the year to within six and half minutes he compiled the first known star catalogue, and made an early formulation of trigonometry after the death of eratosthenes, hipparchus. A brief discussion of eratosthenes's life appears in carl boyer, a history of mathematics (1968) thomas l heath, a manual of greek mathematics (1931), is a full treatment of eratosthenes's mathematical research. Eratosthenes of cyrene 276bc–194bc) was a third century bc greek mathematician, geographer and astronomer he was head of the library of alexandria from 240 bc until his death: this was the most important library of the ancient world.
The life of eratosthenes although biographical data about eratosthenes are limited, it is possi ble to reconstruct a broad outline of his career 37 he was the son of aglaos. Biography of mark twain twain, mark, pseudonym of samuel langhorne clemens (1835-1910), american writer and humorist, whose best work is characterized by broad, often irreverent humor or biting social satire. Short biography eratosthenes was born in north africa the town of cyrene he studied under a number of influential greek scholars, and through those connections he ended up moving to alexandria to be the tutor for a future king of egypt (ptolemy iv.
Among eratosthenes' accomplishments was the accurate measurement the diameter of the earth by observing that, on the day of the summer solstice, the sun was directly overhead in syene while it was 7° from the zenith in alexandria, which he assumed was due north of syene (dunham 1990. The sieve of eratosthenes is a mathematical tool that's used to discover all possible prime numbers between any two numbers eratosthenes was a brilliant greek thinker who, among many other. Of euclid’s life nothing is known except what the greek philosopher proclus (c 410–485 ce) reports in his “summary” of famous greek mathematicians according to him, euclid taught at alexandria in the time of ptolemy i soter , who reigned over egypt from 323 to 285 bce. Aristarchus of samos was born in samos, greece, around 310 bc as for the education of aristarchus, we do know he learned from strato of lampsacus, the instructor who was in charge of aristotle’s lyceum. Eratosthenes' work introduced the concepts of torrid, temperate, and frigid climate zones his map of the world , though highly inaccurate, was the first of its kind, and featured a grid of parallels and meridians used to estimate distances between different locations.
Eratosthenes eratosthenes was an ancient greek scholar who was often called the father of geography he was born in 276 bce at a greek colony in cyrene, libya. A brief biography of tycho brahe by tim lambert tycho brahe was one of the great astronomers of the 16th century he lived before the telescope was invented yet he made very accurate observations of the positions of stars. Eratosthenes was born in cyrene which is now in libya in north africa his teachers included the scholar lysanias of cyrene and the philosopher ariston of chios who had studied under zeno, the founder of the stoic school of philosophy eratosthenes also studied under the poet and scholar callimachus who had also been born in cyrene.
Eratosthenes of cyrene (276–194 bce), the third head of the al- exandrian library, sent a letter to king ptolemy outlining his solution for the geometric problem, the doubling of the cube. Eratosthenes investigated arithmetical and geometrical problems in his sieve method of distinguishing prime numbers, by which the prime and incomposite numbers are separated by themselves as though by some instrument or sieve, there is the foundation for a logical theory of the infinite. Summary in eratosthenes is a man that not only loved to read everything, but he applied everything to life philosophy, mathematics, music, astronomy and other facets of life had interconnecting equations. A brief discussion of eratosthenes's life appears in carl boyer, a history of mathematics (1968) thomas l heath, a manual of greek mathematics (1931), is a full treatment of eratosthenes's mathematical research see also ivor thomas, greek mathematical works, vol 1 (1939. Beginnings aristarchus was born in about the year 310 bc, probably on the greek island of samos, the same island pythagoras was born on 260 years earlier we know very little about aristarchus’s life, but we know enough to be astounded by his science.
The noun eratosthenes has 1 sense: 1 greek mathematician and astronomer who estimated the circumference of the earth and the distances to the moon and sun (276-194 bc. With a ruler here are some sites you might want to take a look at with a short description of what information it has on the webpage. A man of many talents, eratosthenes was a librarian, geographer, mathematician, astronomer, historian, and poet his friends at the library nicknamed him pentathlos, or athlete who competes in five different events. A brief history of the age of exploration article new and old countries biography of sir edmund hillary article biography of eratosthenes article geographer yi-fu tuan article colonial rule in peru article william morris davis view more learn more about geography basics.
Eratosthenes, then thirty years old, accepted ptolemy's invitation and traveled to alexandria, where he lived for the rest of his life within about five years he became chief librarian, a position that the poet apollonius rhodius had previously held. Eratosthenes (greek ἐρατοσθένης 276 bce – 194 bce) was a greek mathematician, geographer and astronomerhis contemporaries nicknamed him beta (greek for number two) because he supposedly proved himself to be the second in the ancient mediterranean world in many fields. Eratosthenes observed that the sun shone directly down a well at high noon on the day of the summer solstice in syene and that it cast a shadow in alexandria, directly south of where the well was to calculate the circumference of the earth, eratosthenes measured the angle of the shadow to the earth.