Roman copy of a bust of Aristotle, circa 384-322 BC
Aristotle believed that the Earth was at the center of the universe, and was only made up of four hierarchical elements: earth, water, air, and fire. He also thought other celestial objects such as the sun, moon, and stars were made up of a superior fifth element (ether). Aristotle's conception of the universe lasted for almost 2000 years, until Copernicus's heliocentric theory began to affect the scientific world.
image © Kunsthistorisches Museum
Bouras, Charalambos, Michael B. Sakellarion, Konstantinos S. Staikes, and Evi Touloups, eds.
Classical Period to Present day (5th Century BC - AD 2000).
Kotinos: Oak Knoll Press, 2003, pg 132
call number: NA 1100.A845
University Corporation for Atmospheric Research.
Internet; accessed 10 November 2004