Greek estimate of earth's circumference

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August undefined, 2024

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 … 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 …

How to Calculate the Circumference of Earth (Step by Step)

WebThroughout history, the shape of the Earth has been debated by scientists and philosophers. By 500 B.C. most scholars thought the Earth was completely spherical. The Greek philosopher Aristotle (384-322 B.C.) is credited as the first person to try and calculate the size of the Earth by determining its circumference (the length around the equator) … 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 … church street metro station

How Did the Ancient Greeks Measure the Circumference …

WebJul 29, 2024 · The idea of a spherical Earth was already known by Pythagoras around 500 BC and validated by Aristotle a few centuries later. If the Ancient Greeks before him were right, and the Earth was a sphere, Eratosthenes could use his observations to calculate … WebSee 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. 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 … dex and perry

$Eratosthenes Measures the Earth – The Math Doctors$

How Aryabhata got the earth

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 … WebUse the measurement to find that the angular Separation on the Earth's surface of Alexandria and syene is 7 degrees. 3 substitute values into angle between cities / 360 degrees equals the distance between cities divided by the Earth's circumference. 4 solve the equation to calculate the circumference of the Earth. dex and rachelWebIf 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 … dex and sophie kiss

"WebJan 14, 2024 · When the ancient Greek philosopher Pythagoras first suggested that the Earth was round in 500 BC, his claim was dismissed as unreasonable. Decades later, Greek philosopher Aristotle proved … " - Greek estimate of earth's circumference

Greek estimate of earth's circumference

June 19, 240 B.C.: The Earth Is Round, and It

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 ... 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.

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WebEratosthenes reasoned that the ratio of the angular difference in the shadows to the number of degrees in a circle (360°) must equal the ratio of the distance to the circumference of … WebJun 8, 2024 · Mathematicians of his time had estimated Earth’s circumference to be “400,000 stadia”, or 62,880-66,680km (39,000 …

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 … 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.

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 ... WebApr 2, 2024 · Eratosthenes, in full Eratosthenes of Cyrene, (born c. 276 bce, Cyrene, Libya—died c. 194 bce, Alexandria, Egypt), Greek scientific writer, astronomer, and …

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 …

WebGreek 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 … dex and sophie fosterWebA century after Eratosthenes, the Greek astronomer Posidonius of Rhodes (c. 135–51 BCE) calculated the Earth’s circumference. Posidonius used the star Canopus as frame of … dex and ward 2007WebThe 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 … church street models basingstoke reviewWebUsing the Sun’s rays as roughly parallel lines, one can show that the angle between the two locations must be the same as the angle measured in Cyrene. Coupling this with the distance between the two cities at about … dex android to computerWebEarth'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 … dex and ward sociologyWebThen 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. dex and vending machinesWebJun 19, 2012 · 240 B.C.: Greek astronomer, geographer, mathematician and librarian Eratosthenes calculates the Earth's circumference. His data was rough, but he wasn't far off. Eratosthenes was an all-around guy ... dex and the city