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Communication Dans Un Congrès Année : 2021

From astronomical computation to astrological interpretation

Résumé

The professed goal of medieval astronomers, while endeavoring to enhance the accuracy and precision of the astronomical calculations, is often to improve thereby the performance of the resulting astrological predictions. Indeed, those are always based on an “horoscope”, a representation of the sky at a specific point of time, usually called “figura caeli” in 15th century Latin manuscripts. Such a figure is not always described in surviving astrological predictions; if so, it might be textually or graphically, through a distinctive diagram known as an “astrological square”. By examining five case-studies chosen in surviving witnesses of 15th century annual prognostications, this paper aims to explore medieval practices such as precision and accuracy of the computations, but also the relation between text and diagram, depending on the intended audience, the astrologers’ own habits, and subjective choices made by successive copists.
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Dates et versions

hal-03374132 , version 1 (11-10-2021)

Identifiants

  • HAL Id : hal-03374132 , version 1

Citer

Alexandre Tur. From astronomical computation to astrological interpretation: figurae caeli and “astrological squares” in 15th century annual prognostications. Alfonsine Astronomy: mathematical practices (2), Oct 2021, Paris, France. ⟨hal-03374132⟩
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