The gravitational influence of Jupiter on the Ptolemaic value for the eccentricity of Saturn

IF 0.7 2区 哲学 Q2 HISTORY & PHILOSOPHY OF SCIENCE
Christián C. Carman
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引用次数: 1

Abstract

The gravitational influence of Jupiter on Saturn produces, among other things, non-negligible changes in the eccentricity of Saturn that affect the magnitude of error of Ptolemaic astronomy. The value that Ptolemy obtained for the eccentricity of Saturn is a good approximation of the real eccentricity—including the perturbation of Jupiter—that Saturn had during the time of Ptolemy's planetary observations or a bit earlier. Therefore, it seems more probable that the observations used for obtaining the eccentricity of Saturn were done near Ptolemy’s time, and rather unlikely earlier than the first century AD. Even if this is not quite a demonstration that Ptolemy used observations of his own, my argument increases its probability and practically discards the idea that Ptolemy borrowed values or observations from astronomers further back than the first century AD, such as Hipparchus or the Babylonians.

Abstract Image

木星引力对土星离心率托勒密值的影响
木星对土星的引力影响导致了土星离心率的不可忽略的变化,这些变化影响了托勒密天文学的误差幅度。托勒密获得的土星离心率值很好地近似了土星在托勒密行星观测期间或更早一点的实际离心率,包括木星的摄动。因此,用于获得土星离心率的观测似乎更有可能是在托勒密时代附近进行的,而不太可能早于公元一世纪。即使这并不能完全证明托勒密使用了自己的观测,我的论点增加了它的可能性,实际上抛弃了托勒密从公元一世纪以前的天文学家那里借来的价值观或观测结果,比如喜帕恰斯或巴比伦人。
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来源期刊
Archive for History of Exact Sciences
Archive for History of Exact Sciences 管理科学-科学史与科学哲学
CiteScore
1.30
自引率
20.00%
发文量
16
审稿时长
>12 weeks
期刊介绍: The Archive for History of Exact Sciences casts light upon the conceptual groundwork of the sciences by analyzing the historical course of rigorous quantitative thought and the precise theory of nature in the fields of mathematics, physics, technical chemistry, computer science, astronomy, and the biological sciences, embracing as well their connections to experiment. This journal nourishes historical research meeting the standards of the mathematical sciences. Its aim is to give rapid and full publication to writings of exceptional depth, scope, and permanence.
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