Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ahes...58..475j&link_type=abstract
Archive for History of Exact Sciences (ISSN 0003-9519), Vol. 58, No. 6, p. 475 - 536 (2004)
Astronomy and Astrophysics
Astronomy
History Of Astronomy, Planets: Observations
Scientific paper
The present paper is an attempt to describe the observational practices behind a large and homogeneous body of Babylonian observation reports involving planets and certain bright stars near the ecliptic ("Normal Stars"). The reports in question are the only precise positional observations of planets in the Babylonian texts, and while we do not know their original purpose, they may have had a part in the development of predictive models for planetary phenomena in the second half of the first millennium B.C. The paper is organized according to the following topics: (I) Sections 1-3 review the format of the observations and the texts in which they are found; (II) Sections 4-6 discuss the composition of the Normal Star list; (III) Sections 7-8 concern the orientation of the reported celestial directions from star to planet; (IV) Section 9 concerns the relationship between the reported distances and the actual angular distances between planet and star; and (V) Section 10 discusses the reports of planetary stations, which are the most common reports giving precise locations of planets when they are not near their closest approach to stars, and draws some brief general conclusions about the utility of the Babylonian observations for estimating planetary longitudes and calibrating models in antiquity.
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