WebSep 4, 2011 · What was the contribution of Eratosthenes? Eratosthenes measured the circumference of the planet using shadows, and got really close to the exact answer. Who was Eratosthenes parents? WebJan 24, 2010 · In this work, which for the first time described the geography of the entire inhabited world as it was then known, Eratosthenes of Kyrene (ca. 285-205 BC) invented the discipline of geography as we understand it. A polymath who served as librarian at Alexandria and tutor to the future King Ptolemy IV, Eratosthenes created the …
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WebUsing these four stades, modern approximations of Eratosthenes’ 250,000 stades can be obtained. Below, the modern equivalent of 250,000 stades is given for each type of stade. WebBorn: 276 BC in Cyrene (modern day Libya) Died: 194 BC (at age 82) in Alexandria, Egypt. Nationality: Greek. Famous For: Calculating the Earth’s circumference. Eratosthenes was a mathematician and astronomer … take cereal
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WebGreece. Hipparchus, also spelled Hipparchos, (born, Nicaea, Bithynia [now Iznik, Turkey]—died after 127 bce, Rhodes?), Greek astronomer and mathematician who … WebEratosthenes will always be remembered for the calculation of the Earth's circumference circa 240 BC, using trigonometry and knowledge of the angle of elevation of the Sun at noon in Alexandria and Syene (now Aswan, Egypt). The calculation is based on the assumption that the Earth is spherical and that the Sun is so far away that its rays can ... Web1. That Alexandria and Syene lie on the same meridian. A meridian is an imaginary circle on the Earth’s surface which passes through both the north and south poles [].]. The plane of any meridian bisects the Earth. If Alexandria and Syene both lie on the same meridian, Eratosthenes is guaranteed that two cities and the center of the Earth are all contained … take center east st louis il