Search results
Eratosthenes of Cyrene (/ ɛr ə ˈ t ɒ s θ ə n iː z /; Greek: Ἐρατοσθένης [eratostʰénɛːs]; c. 276 BC – c. 195/194 BC) was a Greek polymath: a mathematician, geographer, poet, astronomer, and music theorist. He was a man of learning, becoming the chief librarian at the Library of Alexandria.
Eratosthenes (born c. 276 bce, Cyrene, Libya—died c. 194 bce, Alexandria, Egypt) was a Greek scientific writer, astronomer, and poet, who made the first measurement of the size of Earth for which any details are known.
Mar 3, 2022 · Eratosthenes (l. c. 276-195 BCE) was a Greek astronomer, geographer, mathematician, and poet best known for being the first to calculate the circumference of the earth and its axial tilt.
Jul 3, 2019 · Eratosthenes of Cyrene (c. 276 BCE–192 or 194 BCE) was an ancient Greek mathematician, poet, and astronomer who is known as the father of geography.
More than 2,000 years ago Eratosthenes compared the position of the Sun’s rays in two locations to calculate the spherical size of the Earth with reasonable accuracy. Eratosthenes was born in the Greek colony Cyrene, now the city of Shahhat, Libya.
Eratosthenes was a Greek mathematician who is famous for his work on prime numbers and for measuring the diameter of the earth. View one larger picture. Biography. Eratosthenes was born in Cyrene which is now in Libya in North Africa.
Jun 7, 2024 · sieve of Eratosthenes, systematic procedure for finding prime numbers that begins by arranging all of the natural numbers (1, 2, 3, …) in numerical order.
Jan 14, 2020 · Eratosthenes (c.276 to 194 B.C.), a mathematician, is known for his mathematical calculations and geometry. Eratosthenes was called "Beta" (the second letter of the Greek alphabet) because he was never first, but he is more famous than his "Alpha" teachers because his discoveries are still used today. Chief among these is the calculation of the ...
Feb 27, 2019 · Eratosthenes was one of the great scholars of Antiquity. Born in Cyrene in c. 285, he studied in Athens before becoming the third librarian at the great research institute founded by King Ptolemy I at Alexandria in Egypt.
Eratosthenes devised a system of latitude and longitude, and a calendar that included leap years. He invented the armillary sphere, a mechanical device used by early astronomers to demonstrate and predict the apparent motions of the stars in the sky.
Related searches
