Greek estimate of earth's circumference

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August undefined, 2024

WebBook Two in The Histories by the ancient historian Herodotus (480-425 BCE) tells us that 1 stade is equal to 600 Greek feet. Like the stade, the Greek foot exhibits some regional … WebJune, ca. 240 B.C. Eratosthenes Measures the Earth. By around 500 B.C., most ancient Greeks believed that Earth was round, not flat. But they had no idea how big the planet is until about 240 B.C., when Eratosthenes …

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WebOver 2000 years ago, the Greek scholar Eratosthenes estimated Earth's circumference by assuming that the Sun's rays were parallel. He chose a day when the Sun shone straight down into a well in the city of Syene. At noon, he measured the angle the Sun's rays made with a vertical stick in the city of Alexandria. WebFeb 3, 2024 · So in other words, 5000 stades along the circumference of the Earth was equal to 7.2 degrees of arc along the circumference of the Earth. And because 7.2 degrees is equal to 1/50th of a full sphere … philyor

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WebApr 25, 2024 · Earth’s Measurements. With a circumference of 40,075 km, Earth is the fifth largest of the planets in the Solar System. The meridional circumference that is … WebAbu Rayhan al-Biruni (AD 973--1048) The 11th century Persian mathematician Abu Rayhan al-Biruni used simple trigonometric results to estimate the radius and circumference of the Earth. This content is … WebA stade was an ancient Greek unit of measurement (150-200 meters). He also assumed that Syene was due south of Alexandria and on the same meridian of longitude. ... He also estimated the circumference of the … tsingtao stock price

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WebMar 30, 2024 · Therefore, Eratosthenes figured that he could estimate the circumference of the entire sphere. Based on the shadow’s length of 7 degrees in Alexandria and 0 degrees in Syene, Eratosthenes calculated that the two cities are 7 degrees apart on Earth’s 360-degree sphere. WebJun 8, 2024 · Mathematicians of his time had estimated Earth’s circumference to be “400,000 stadia”, or 62,880-66,680km (39,000 … phil yordy potteryWebThen he could measure the angular distance in the sky between the Sun and the Moon, plus the Earth-Moon distance and geometry, to get the Earth-Sun distance. The most famous ancient estimate of the earth's circumference as made by Eratosthenes of Cyrene (c. 276-196 BCE), the librarian at the great library at Alexandria. phil yoder

"WebEratosthenes assumed that the distance from. Over 2000 years ago, the Greek scholar Eratosthenes estimated Earth’s circumference by assuming that the Sun’s rays are parallel. He chose a day when the Sun shone straight down into a well in the city of Syene. At noon, he measured the angle the Sun’s rays made with a vertical stick in the ... " - Greek estimate of earth's circumference

Greek estimate of earth's circumference

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WebMay 28, 2024 · This means that you have moved 30 degrees around the Sphere (Earth) in those 400 miles. Well, since there are 360 degrees in a circle and 30/360 = 1/12, then 400 must be 1/12th of the total circumference of the Earth. So the circumference of the Earth is 12 * 400 or 4800 miles. Now take note: these numbers are made up and do not reflect ... WebIn the third century BCE, Eratosthenes, a Greek librarian in Alexandria, Egypt, determined the earth's circumference to be 40,250 to 45,900 kilometers (25,000 to 28,500 miles) by comparing the Sun's relative …

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WebOct 31, 2024 · The Earth’s circumference was first accurately measured more than 2,200 years ago by a Greek astronomer named Eratosthenes. Eratosthenes method was very … WebThat unit is mentioned by Pliny when he equated 40 of them to 12,000 royal cubits, of which each is about 0.525 meters. Therefore, 1 stadia is 300 cubits, which is 157.5 meters, which is about 516.73 feet. Therefore, …

WebThe actual polar circumference of Earth is just a bit over 40 thousand km (about 24,860 miles). Eratosthenes was a talented mathematician and geographer as well as an … WebEratosthenes made a calculation by multiplying the distance by the angle. He was able to determine the Earth's circumference and then another calculation to work out the diameter. Confusingly, there were 2 different measurements for a stadia but scientists believe he used a unit which led to the circumference being within 1 degree of the modern ...

WebSep 4, 2024 · The circumference of the earth was 40,000 kilometres, according to Eratosthenes' calculations. WebWith a stade of 185 m (607 ft), 804,000,000 stadia is 149,000,000 km (93,000,000 mi), approximately the distance from the Earth to the Sun. Eratosthenes also calculated the Sun's diameter. According to …

WebThe goal of this project is to estimate the circumference of the earth by setting up a mathematical proportion from simple measurements. Introduction In this project, you will estimate the circumference of the earth, using a method developed about 2,200 years ago, by Eratosthenes, a Greek mathematician and the librarian of the great library at ...

WebEarth's circumference was first accurately measured more than 2,000 years ago by the Greek astronomer Eratosthenes, who at the time lived in the Egyptian city of Alexandria. … tsingtao universityWebFeb 15, 2024 · The first known person to calculate the circumference of the earth was the Greek astronomer Eratosthenes (as the legend goes, without leaving Egypt), during his lifetime between the 3rd and 2nd ... tsingtao university of science and technologyhttp://www.geo.hunter.cuny.edu/~jochen/gtech201/lectures/lec6concepts/Datums/Determining%20the%20earths%20size.htm tsingtao university of technologyWebEarth's circumference is the distance around Earth. Measured around the Equator poles. Measurement of Earth's circumference has been important to navigation since ancient times. The first known scientific measurement … phily one liberty observation deskWebSee Answer. Question: 1.Eratosthenes was a Greek writer and astronomer who estimated the circumference of the Earth using the ideas in 1, 2, 3 above. He noticed that, at noon on summer solstice in a place called Syene, the sun’s rays went directly down a well. At the same time, in Alexandria, the sun cast a shadow of 7.5 off a vertical object. phil yostWebIf we accept the account of Strabo that Eratosthenes measured the circumference of the earth as 252,000 stadia, the circumference would be 24,662 miles, and the polar … philyoungforcountycommissiondistrict 8WebGreek astronomer who discovered and proposed that planets (including Earth) revolved around the sun Eratosthenes Greek mathematician, astronomer, and geographer who devised a map of the world, estimated the circumference of the earth and the distance to the moon and the sun, and constructed a method for finding prime numbers; his … phil yoshida