AstroPhysics17 - Almagest ( Syntaxis in Greek) as Handbook...

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Aristarchus of Samos: used geometry to find relative distances of Moon, Sun. Proposed that Earth rotated once a day but view was discredited. • Hipparchus of Rhodes: greatest ancient observer- cataloged positions of 850 stars and invented stellar magnitude system for visible brightness of stars (1 to 6), Discovered precession- Vernal Equinox changes 1 O every 78 years. • Claudius Ptolemy of Alexandria (150 AD): replaced spheres with epicycles, eccentrics- Wrote
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Unformatted text preview: Almagest ( Syntaxis in Greek) as Handbook of Astronomy (48 constellations, with positions of stars, brightnesss of 1022 stars. Wrote Tetrobioblious as Handbook of Astrology . Ptolemys geocentric universe lasted for 1500 years. Ptolomys main accomplishment was to adapt these earlier ideas into a single system that agreed with observations of the day. He developed models which could predict planetary positions within a few degrees...
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This note was uploaded on 09/28/2011 for the course PHYSICS 20 taught by Professor Mubarek during the Fall '11 term at UC Riverside.

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AstroPhysics17 - Almagest ( Syntaxis in Greek) as Handbook...

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