eratosthenes

• Nom propre désignant Ératosthène, savant grec du IIIe siècle av. J.-C., mathématicien, astronome et géographe, connu pour avoir calculé la circonférence de la Terre et estimé les distances à la Lune et au Soleil.

A proper noun referring to a Greek mathematician and astronomer from the 3rd century BC, known for calculating the Earth's circumference and estimating distances to the Moon and Sun.

indénombrable · nom propre

1. Greek scholarC1formal

   An ancient Greek mathematician, astronomer, and geographer who accurately calculated the Earth's circumference and the distances to the Moon and Sun.

   Ératosthène

   • Eratosthenes used shadows and geometry to estimate the Earth's size.
   • The works of Eratosthenes laid the foundation for modern geography.
   • He was the chief librarian of the Library of Alexandria.