英和和英

出典:『Wikipedia』 (2011/06/12 01:17 UTC 版)

英語による解説

引用

The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC, but remained a matter of philosophical speculation until the 3rd century BC when Hellenistic astronomy established the spherical shape of the earth as a physical given. The Hellenistic paradigm was gradually adopted throughout the Old World during Late Antiquity and the Middle Ages. A practical demonstration of Earth's sphericity was achieved by Ferdinand Magellan / Juan Sebastian Elcano's expedition's circumnavigation (1519−1521).