Skip to Main content Skip to Navigation
Conference papers

From astronomical computation to astrological interpretation: figurae caeli and “astrological squares” in 15th century annual prognostications

Abstract : 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.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03374132
Contributor : Alexandre Tur Connect in order to contact the contributor
Submitted on : Monday, October 11, 2021 - 10:03:09 PM
Last modification on : Tuesday, October 12, 2021 - 5:20:53 PM

Identifiers

  • HAL Id : hal-03374132, version 1

Collections

Citation

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⟩

Share

Metrics

Record views

15