Ancient heliocentrists, Ptolemy, and the equant
作者:
Dennis Rawlins,
期刊:
American Journal of Physics
(AIP Available online 1987)
卷期:
Volume 55,
issue 3
页码: 235-239
ISSN:0002-9505
年代: 1987
DOI:10.1119/1.15224
出版商: American Association of Physics Teachers
关键词: ASTRONOMY;HISTORICAL ASPECTS;ORBITS;MARS PLANET;VENUS PLANET
数据来源: AIP
摘要:
Evidence is presented suggesting an ancient heliocentrist origin for geocentrist C. Ptolemy’s planetary orbit elements and the equant. Pliny’s data for Venus are shown to be inconsistent with geocentricity, and a heliocentric period‐relation is found to be the basis of Ptolemy’s previously unexplained and astonishingly accurate tables of the mean motion of Mars, the very planet whose orbit produced the equant. The admirable correctness of his adopted Mars elements is patently inconsistent with the ordmag 1° inaccuracy of Ptolemy’s geocentric model and of his alleged empirical production.
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