Greek estimate of earth's circumference
WebFeb 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 ... WebA 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 …
Greek estimate of earth's circumference
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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 ... WebUsing 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 …
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. 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 …
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 … WebJun 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 ...
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 …
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. fishbites saltwater baitWebWith 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 … fish bites seafood carolina beachWebApr 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 poet, who made the first measurement of the … can a baby hear in the wombWebDec 27, 2024 · In the mid-20th century, we began launching satellites into space that would help us determine the exact circumference of the … fishbites sand fleafish bites seafood restaurant wilmington ncWebEarth'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. … can a baby hide on an ultrasound at 20 weeksWebEratosthenes 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 … can a baby hide on an ultrasound