Article ID: CBB458115218

Joseph Ibn Waqār and the treatment of retrograde motion in the middle ages (2023)

unapi

In this article, we report the discovery of a new type of astronomical almanac by Joseph Ibn Waqār (Córdoba, fourteenth century) that begins at second station for each of the planets and may have been intended to serve as a template for planetary positions beginning at any dated second station. For background, we discuss the Ptolemaic tradition of treating stations and retrograde motions as well as two tables in Arabic zijes for the anomalistic cycles of the planets in which the planets stay at first and second stations for a period of time (in contrast to the Ptolemaic tradition). Finally, we consider some medieval astrological texts where stations or retrograde motions are invoked.

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Authors & Contributors
Falk, Seb
Gamini, Amir Mohammad
Goldstein, Bernard R.
Grupe, Dirk
Hamedani, Hossein Masoumi
Hughes, Jonathan
Journals
Journal for the History of Astronomy
Aleph: Historical Studies in Science and Judaism
Tarikh-e Elm (The Iranian Journal for the History of Science)
Micrologus: Nature, Sciences and Medieval Societies
Archive for History of Exact Sciences
Physics in Perspective
Publishers
Brepols Publishers
Anchor
Brill
Continuum
Written Heritage Research Institute (Miras-e Maktoob)
Concepts
Astronomy
Astrology
Orbits; planets
Cosmology
Science and religion
Manuscripts
People
al-Kāshī, Jamshīd Ibn Maḥmūd Ghyāth al-Dīn
al-Ṭūsī, Abū Jaʿfar Muḥammad Naṣīr al-Dīn
Euclid
Galen
Guillaume de Conches
Levi Ben Gershon
Time Periods
Medieval
14th century
13th century
15th century
12th century
Renaissance
Places
France
Iran
Paris (France)
India
Persia (Iran)
Italy
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