- Anaximander of Miletus
Anaximander of Miletus (610-ca. 546 BC) conceived the idea that the stars were fixed on a crystalline sphere rotating around the Earth. Anaximander thought the Earth to be cylindrical with a diameter three times its height, and the center of the universe.
http://scienceworld.wolfram.com/biography/Anaximander.html
(Added: Sun Oct 27 2002)
- Anaximenes of Miletus
Anaximenes was the first Greek to distinguish clearly between planets and stars. He believed the primary substance of the universe to be air, which could form the other elements of water, Earth, and fire by rarefaction and condensation. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Anaximenes.html
(Added: Sun Oct 27 2002)
- Aristarchus and the Size of the Moon
The jump Aristarchus made from terrestrial measurements of scale to the celestial is truly remarkable. Without any measures of the sizes of or distances to any celestial objects, he was able to measure both for the Moon.
http://www.hastings.edu/Courses/physics/sivron/astronomy/specials/aristarchus.html
(Added: Sat Oct 26 2002)
- Aristarchus of Samos
Aristarchus of Samos (ca. 310-ca. 230 BC) was a Greek philosopher who theorized the radical view that Earth and planets revolve around the Sun. This page is part of Eric Weisstein's World of Scientific Biography. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Aristarchus.html
(Added: Sun Oct 27 2002)
- Aristarchus of Samos
Biography of Aristarchus (310BC-230BC)
http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Aristarchus.html
(Added: Sun Oct 27 2002)
- Aristotle
Aristotle was a Greek philosopher who lived between 384-322 B.C. He was one of the greatest thinkers of the world and his written works encompassed all major areas of thought: logic, science, metaphysics, ethics, and politics.
http://www.windows.ucar.edu/tour/link=/people/ancient_epoch/aristotle.html&edu=high
(Added: Sun Oct 27 2002)
- Aristotle of Stagira
Aristotle of Stagira (384-322 BC) accepted the heavenly spheres of Eudoxus, thought the Earth to be spherical, and imagined a perfectly spherical unchanging universe centered on the Earth. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Aristotle.html
(Added: Sun Oct 27 2002)
- Eratosthenes of Cyrene
Eratosthenes of Cyrene (ca. 284-ca. 192 BC): Among Eratosthenes' accomplishments was the accurate measurement the diameter of the Earth by observing that, on the day of the summer solstice, the Sun was directly overhead in Syene while it was 7° from the zenith in Alexandria, which he assumed was due north of Syene (Dunham 1990). This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Eratosthenes.html
(Added: Sat Oct 26 2002)
- Eudoxus of Cnidus
Eudoxus of Cnidus (ca. 400-ca. 347 BC) was a Greek philosopher, astronomer, and mathematician who accepted Plato's notion of the rotation of the planets around the Earth on crystalline spheres, but noticed discrepancies with observations. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Eudoxus.html
(Added: Sat Oct 26 2002)
- Greek Astronomy
The Greek Astronomy subsection in the Mathematics section at the Library of Congress Vatican Exhibit.
http://www.ibiblio.org/expo/vatican.exhibit/exhibit/d-mathematics/Greek_astro.html
(Added: Sat Oct 26 2002)
- Greek Geocentric and Heliocentric Cosmologies
The Greeks, who to a great extent are responsible for developing geometry and trigonometry, sought a geometrical explanation of planetary motions rather than the simply numerical relationships found by the Babylonians.
http://www.physics.gmu.edu/~jevans/astr103/CourseNotes/history_greekGeocentricHeliocentric.html
(Added: Sat Oct 26 2002)
- Heraclides of Heraclea Pontus
Heraclides of Heraclea Pontus (ca. 388-315 BC) was a Greek philosopher who was the first to suggest that the rotation of the Earth would account for the apparent rotation of the stars. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Heraclides.html
(Added: Sun Oct 27 2002)
- Hipparchus of Nicaea
Hipparchus of Nicaea (ca. 190-ca. 120 BC) compiled an extensive star catalogue in which stars were classified in "magnitudes" according to their brightness. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Hipparchus.html
(Added: Sat Oct 26 2002)
- Ptolemy
Ptolemy (ca. 100-ca. 170), Roman name: Claudius Ptolemaeus. Greek philosopher who synthesized and extended Hipparchus's system of epicycles and eccentric circles to explain his geocentric theory of the solar system. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Ptolemy.html
(Added: Sat Oct 26 2002)
- Pythagoras
Pythagoras of Samos was a Greek philosopher responsible for important developments in mathematics, astronomy and the theory of music.
http://www.geocities.com/CapeCanaveral/Launchpad/3740/history.html
(Added: Mon Oct 07 2002)
- Pythagoras of Samos
Pythagoras of Samos (ca. 560-ca. 480 BC) was the first Greek to realize that the morning star and evening star were both the planet Venus. Pythagoras postulated that the Earth was spherical, and added more crystalline spheres to Anaximander's model, one for each planet, to account for the motions of the various planets. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Pythagoras.html
(Added: Sun Oct 27 2002)
- Thales of Miletus
Thales of Miletus (634-546 BC) predicted the year of the May 28, 585 BC solar eclipse, confirming his access to Babylonian records.
http://scienceworld.wolfram.com/biography/Thales.html
(Added: Sat Oct 26 2002)
- The Shape of the Earth
This is a classroom exercise. Aristotle concluded the Earth must be spherical because of the shape of the darkened shadow of Earth that moves across the face of the Moon during lunar eclipses.
http://www.uncfsu.edu/msec/nova/timmod1k.htm
(Added: Sat Oct 26 2002)
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