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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 276 – 194 BC, ancient Greece
* 1184 BC – Trojan War: Troy is sacked and burned, according to calculations by Eratosthenes.
* Eratosthenes ( late 3rd century BC )
Maps based on scientific principles had been made since the time of Eratosthenes ( 3rd century BC ), but Ptolemy improved projections.
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.
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 ( c. 276 – 194 BC ), Greek mathematician, geographer and astronomer

Eratosthenes and ),
Several works among the best known during this long period could be cited as an example, from Strabo ( Geography ), Eratosthenes ( Geography ) or Dionisio Periegetes ( Periegesis Oiceumene ) in the Ancient Age to the Alexander von Humboldt ( Cosmos ) in the century XIX, in which geography is regarded as a physical and natural science, of course, through the work Summa de Geografía of Martín Fernández de Enciso from the early sixteenth century, which is indicated for the first time the New World.
The Hellenistic world view after Seleucus: ancient world map of Eratosthenes ( 276 – 194 BC ), incorporating information from the campaigns of Alexander and his successors.
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.
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.
Herodotus, Strabo, and other classical authors repeatedly mention the Caspians but do not seem to know much about them ; they are grouped with other inhabitants of the southern shore of the Caspian Sea, like the Amardi, Anariacae, Cadusii, Albani ( see below ), and Vitii ( Eratosthenes apud Strabo, 11. 8. 8 ), and their land ( Caspiane ) is said to be part of Albania ( Theophanes Mytilenaeus apud Strabo, 11. 4. 5 ).
In addition to the Eratosthenes Batavus, he published ( 1621 ), and Tiphys Batavus ( 1624 ).
He had a high reputation as a Grecian, a Latinist and a philologist, and he brought out with the collaboration of others his an edition of St Cyprian in 1682, an English translation of The Unity of the Church in 1681, editions of Nemesius of Emesa ( 1671 ), of Aratus and of Eratosthenes ( 1672 ), Theocritus ( 1676 ), Alcinous on Plato ( 1677 ), St Clement's Epistles to the Corinthians ( 1677 ), Athenagoras ( 1682 ), Clemens Alexandrinus ( 1683 ), Theophilus of Antioch ( 1684 ), Grammatica rationis sive institutiones logicae ( 1673 and 1685 ), and a critical edition of the New Testament in 1675.
Strabo in his Geography ( c. 30 ), Book I, Chapter 4, mentions Thule in describing Eratosthenes ' calculation of " the breadth of the inhabited world " and notes that Pytheas says it " is a six days ' sail north of Britain, and is near the frozen sea.
* Chronicle ( Χρονικά ), a Greek history in verse from the fall of Troy in the 12th century BC to roughly 143 BC ( although later it was extended as far as 109 BC ), and based on previous works by Eratosthenes of Cyrene.
:" Accordingly, the Volcae Tectosages, seized on those parts of Germany which are the most fruitful lie around the Hercynian forest, ( which, I perceive, was known by report to Eratosthenes and some other Greeks, and which they call Orcynia ), and settled there.
By solving the riddle ( calculating all the prime numbers below 100 using the Sieve of Eratosthenes and pressing the corresponding buttons backwards ), Roland and his ka-tet are allowed to board Blaine and flee Lud, just as Blaine releases poison gas ( DEP3, a substance similar to what appears as a poison in another of King's books, Eyes of the Dragon.

Eratosthenes and who
Although Strabo cited the antique Greek astronomers Eratosthenes and Hipparchus, acknowledging their astronomical and mathematical efforts towards geography, he claimed that a descriptive approach was more practical, such that his works were designed for statesmen who were more anthropologically than numerically concerned with the character of countries and regions.
Eratosthenes of Alexandria, who died about 194 BC, wrote on astronomy and geography, but his work is known mainly from later summaries.
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.
Posidonius was informed in his approach to finding the Earth's circumference by Eratosthenes, who a century earlier used the elevation of the sun at different latitudes to arrive at a figure of 250, 000 stadia ( which he rounded to 252, 000 so that it would be divisible by 60 ).
1241 indicates that Apollonius was succeeded in the position by Eratosthenes ; this must have been after 247 / 246 BCE, the date of the accession of Ptolemy III Euergetes, who was probably tutored by Apollonius and who appointed Eratosthenes.
Lysias and Polemarchus were rich men, having inherited property from their father, Cephalus ; and Lysias claims that, though merely resident aliens, they discharged public services with a liberality which shamed many of those who enjoyed the franchise ( Against Eratosthenes xii. 20 ).
Richard Pankhurst and others have argued that the name should be understood as " River of the Boras people ", where asta can be related to Proto-Nubian asti " water "., while-boras can be linked to a number of Roman allusions to a tribe named the Bora, who lived near Meroe, and another tribe named the Megabares ( in Eratosthenes and Strabo, in Pliny the Elder ).
Eratosthenes of Alexandria, who died about 194 BC, wrote on astronomy and geography, but his work is known mainly from later summaries.
About 150 years after the disaster, the philosopher Eratosthenes visited the site and reported that a standing bronze statue of Poseidon was submerged in a " poros ", " holding in one hand a hippocamp ", where it posed a hazard to those who fished with nets.
Strabo mentions him as a contemporary of Eratosthenes, who was born 275 BC.
Eratosthenes, who lived in Athens as a young man, claimed that Aristo and Arcesilaus were the two most important philosophers of his age.

Eratosthenes and made
That alternative route, different from the theoretical eastward route, was based on calculations of the Earth's circumference made by Columbus which showed the measurement to be substantially less than the classic 10, 000 mile figure given by Eratosthenes in the 3rd century BC.
* The first good measurement of the distance between Earth and the Sun is made by Eratosthenes ( approximate date ).
The land that became known as Khorasan in geography of Eratosthenes was recognized as Ariana at that time, which made up Greater Iran or the land where Zoroastrianism was the dominant religion.

Eratosthenes and first
Eratosthenes the Cyrene was the first to divide the surface of the earth into lines of latitude and longitude.
The Return of the Heracleidae, which is the closest event to a Dorian Invasion available in legend, must coincide with the entry of Aristodemus and his brethren into Arcadia, which, based on the chronology of Eratosthenes, happened 328 years before the generally accepted date of the first year of the first Olympiad, 776 BC.
The Return of the Heracleidae, which is the closest event to a Dorian Invasion available in legend, must coincide with the entry of Aristodemus and his brethren into Arcadia, which, based on the chronology of Eratosthenes, happened 328 years before the generally accepted date of the first year of the first Olympiad, 776 BC.
De Astronomia was first published, with accompanying figures, by Erhard Ratdolt in Venice, 1482, under the title Clarissimi uiri Hyginii Poeticon astronomicon opus utilissimum This " Poetic astronomy by the most renowned Hyginus, a most useful work ," chiefly tells us the myths connected with the constellations, in versions that are chiefly based on Catasterismi, a work that was traditionally attributed to Eratosthenes.
The first scientific estimation of the radius of the earth was given by Eratosthenes.
Many parts of modern geometry are based on the work of Euclid, while Eratosthenes was one of the first scientific geographers, calculating the circumference of the earth and conceiving the first maps based on scientific principles.
The first known grade measurement was performed by Eratosthenes ( 240 BC ) between Alexandria and Syene in what is now Egypt, determining the radius of the Earth with remarkable correctness.
The first person to use the word " geography " was Eratosthenes ( 276-194 BC ).
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.
The founder of the mathematical school was the celebrated Euclid ; among its scholars were Archimedes ; Apollonius of Perga, author of a treatise on Conic Sections ; Eratosthenes, to whom we owe the first measurement of the earth ; and Hipparchus, the founder of the epicyclical theory of the heavens, afterwards called the Ptolemaic system, from its most famous expositor, Claudius Ptolemy.

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