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* Eratosthenes 276 – 194 BC, ancient Greece
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Eratosthenes and 276
Early in Classical Greece, that the earth is a sphere (" round "), was generally known by all, and around 240 BCE, Eratosthenes ( 276 BCE – 194 BCE ) accurately estimated its circumference.
* Eratosthenes ( c. 276 – 194 BC ), Greek mathematician, geographer and astronomer
** Eratosthenes, Greek mathematician, geographer and astronomer ( b. 276 BC )
* Eratosthenes, Greek mathematician, geographer and astronomer ( b. 276 BC )
The Hellenistic world view after Seleucus: ancient world map of Eratosthenes ( 276 – 194 BC ), incorporating information from the campaigns of Alexander and his successors.
The Greek astronomer Hipparchus ( c. 190 – c. 120 BCE ) credited Eratosthenes ( 276 – 194 BCE ) as the inventor of the armillary sphere.
This was the same process used by the ancient Greek Eratosthenes ( 276 – 196 BC ).
Eratosthenes and –
* 1184 BC – Trojan War: Troy is sacked and burned, according to calculations by Eratosthenes.
Those who believe that the stories of the Trojan War are derived from a specific historical conflict usually date it to the 12th or 11th centuries BC, often preferring the dates given by Eratosthenes, 1194 – 1184 BC, which roughly corresponds with archaeological evidence of a catastrophic burning of Troy VIIa.
* 200 BC – Eratosthenes uses shadows to determine that the radius of the Earth is roughly 6, 400 km
Those who believe that the stories of the Trojan War derive from a specific historical conflict usually date it to the twelfth or eleventh centuries BC, often preferring the dates given by Eratosthenes, 1194 – 1184 BC, which roughly correspond with archaeological evidence of a catastrophic burning of Troy VIIa.
This possibility is likely, given that many ancient Greek philosophers are thought to have lived over the age of 90 ( e. g., Xenophanes of Colophon, c. 570 / 565 – c. 475 / 470 BC, Pyrrho of Ellis, c. 360 – c. 270 BC, Eratosthenes of Cirene, c. 285 – c. 190 BC, etc .).
The two towns were separated by one degree on the meridian, so from his measurement he was able to calculate a value for the circumference of the earth – a feat celebrated in the title of his book Eratosthenes Batavus ( The Dutch Eratosthenes ), published in 1617.
240 BC – Eratosthenes measures the Earth's circumference and diameter
Because it is a simple extension of Eratosthenes ' idea, it is sometimes called the Legendre – Eratosthenes sieve.
Eratosthenes and 194
Eratosthenes of Alexandria, who died about 194 BC, wrote on astronomy and geography, but his work is known mainly from later summaries.
* Eratosthenes, Greek mathematician, geographer and astronomer ( d. 194 BC )
Eratosthenes of Alexandria, who died about 194 BC, wrote on astronomy and geography, but his work is known mainly from later summaries.
Eratosthenes and BC
As noted in the book Huai Nan Zu, in the 2nd Century BC Chinese astronomers effectively inverted Eratosthenes ' calculation of the curvature of the Earth to calculate the height of the sun above the earth.
The Earth's circumference was first determined around 240 BC by Eratosthenes.
* Eratosthenes ( late 3rd century BC )
* Eratosthenes ( 276194 BC ), who made the first known reliable estimation of the Earth's size.
Maps based on scientific principles had been made since the time of Eratosthenes ( 3rd century BC ), but Ptolemy improved projections.
Ephorus gives 1135 BC, Sosibius 1172 BC, Eratosthenes 1184 BC / 1183 BC, Timaeus 1193 BC, the Parian marble 1209 BC / 1208 BC, Dicaearchus 1212 BC, Herodotus around 1250 BC, Eretes 1291 BC, while Douris 1334 BC.
Ancient Greek historians variously placed the Trojan War in the 12th, 13th, or 14th centuries BC: Eratosthenes to 1184 BC, Herodotus to 1250 BC, Duris of Samos to 1334 BC.
Eratosthenes and ancient
In mathematics, the sieve of Eratosthenes (), one of a number of prime number sieves, is a simple, ancient algorithm for finding all prime numbers up to any given limit.
Most ancient Greek and Roman chroniclers, poets, grammarians and scholars ( Eratosthenes, Varro, Apollodorus of Athens, Ovid, Censorinus, Catullus, and Castor of Rhodes ) believed in a threefold division of history: ádelon ( obscure ), mythikón ( mythical ) and historikón ( historical ) periods.
It is an optimized version of the ancient sieve of Eratosthenes which does some preliminary work and then marks off multiples of the square of each prime, rather than multiples of the prime itself.
During the Renaissance, printing of Catasterismi, invariably attributed to Eratosthenes, began early, but the work was always overshadowed by Hyginus, the only other ancient repertory of catasterisms.
) to be purely legendary, many modern mathematicians and astronomers believe the description to be reasonable ( and believe Eratosthenes ' achievement to be one of the more impressive accomplishments of ancient astronomy ).
Eratosthenes and Greece
Eratosthenes was the first to write on physical geography ; he also first attempted to draw up a chronological table of the Egyptian kings and of the historical events of Greece.
276 and –
** Mani ( c. 216 AD – 276 AD )
Proceedings of the Academy of Natural Sciences of Philadelphia 98: 271 – 276
" Canadian Journal of Political Science 9 ( 2 ): 261 – 276.
Neue Jahrbücher für das Klassische Altertum, Geschichte und Deutsche Literatur 15: 276 – 312, 1905
In the 2005-2009 period, Italy has been the first EU arms exporter towards Libya, with a total value of € 276. 7m, of which one third only in the last 2008 – 2009 years.
The Taylor Report and Premier League regulations obliged Liverpool to convert Anfield to an all-seater stadium in time for the 1993 – 94 season, reducing the capacity to 45, 276.
Although most of the original writings of the founding prophet Mani ( in Persian: مانی, Syriac:, Latin: Manichaeus or Manes ) ( c. AD 216 – 276 ) have been lost, numerous translations and fragmentary texts have survived.
The date of his death is estimated at AD 276 – 277.
200 – June 276 ), was Roman Emperor from 275 to 276.
* McMahon, Robin, " Tacitus ( 275 – 276 A. D )", De Imperatoribus Romanis
* Horace Kinder Mann, The Lives of the Popes in the Early Middle Ages from 590 to 1304 ( London 1910 ) 5: 249, 250, 252 – 253, 254, 256, 259 – 260, 276.
In the third Christian century Manichaeism spread both east and west from Babylonia, then within the Sassanid Empire, where its founder Mani lived about 216 – 276.
* ( Göran Dahlbäck pp 17 – 72, Robert Sandberg pp 75 – 184, Eva Eggeby and Klas Nyberg pp 187 – 276.
The team has compiled a 250 – 266 record ( 257 – 276 counting the playoffs ) for a. 484 winning percentage (. 482 counting the playoffs ).
* 229 BC – Demetrius II, King of Macedonia from 239 BC ( b. c. 276 BC )
* January 3 – Jin Yuandi, emperor of the Jin Dynasty ( b. 276 )
The Ming Dynasty, also Empire of the Great Ming, was the ruling dynasty of China for 276 years ( 1368 – 1644 ) following the collapse of the Mongol-led Yuan Dynasty.
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