Astronomies And Cultures In Early Medieval Europe

This book provides an overview of the astronomical practices that continued through the so-called "Dark Ages." Like the astronomies of traditional societies, early medieval astronomies established a religious framework of sacred time and ritual calender; here Christian feasts tied to a pre-Christian ritual solar calender, the date of Easter tied to the Hebrew lunar calender; and the timing of monastic prayers in terms of the course of the stars. Coupled with the remnants of ancient geometrical astronomy, these provided the framework for the rebirth of astronomy with the rise of the medieval universities.

The Gregorian calendar reform of 1582, which provided the basis for the civil and Western ecclesiastical calendars still in use today, has often been seen as a triumph of early modern scientific culture or an expression of papal ambition in the wake of the Counter-Reformation. Much less attention has been paid to reform's intellectual roots in the European Middle Ages, when the reckoning of time by means of calendrical cycles was a topic of central importance to learned culture, as impressively documented by the survival of relevant texts and tables in thousands of manuscripts copied before 1500. For centuries prior to the Gregorian reform, astronomers, mathematicians, theologians, and even Church councils had been debating the necessity of improving or emending the existing ecclesiastical calendar, which throughout the Middle Ages kept losing touch with the astronomical phenomena at an alarming pace. Scandalous Error is the first comprehensive study of the medieval literature devoted to the calendar problem and its cultural and scientific contexts. It examines how the importance of ordering liturgical time by means of a calendar that comprised both solar and lunar components posed a technical-astronomical problem to medieval society and details the often sophisticated ways in which computists and churchmen reacted to this challenge. By drawing attention to the numerous connecting paths that existed between calendars and mathematical astronomy between the Fall of Rome and the end of the fifteenth century, the volume offers substantial new insights on the place of exact science in medieval culture.

Early medieval astronomy, esp. in the era of Charlemagne & his successors, consisted of texts that went far beyond the boundaries of computus, which modern scholars have long believed to be the only significant context for astronomical studies of that time. The texts contained innovative diagrams where no other sign of divergence from the text could be seen. Such diagrams were found to provide an indication of understandings of the texts -- which were different from those of modern scholars. Contents: Astronomy & Its Teaching in Carolingian Europe; Functions & Locations of Planetary Diagrams; Sources & Topics of Planetary Diagrams; Plinian Diagrams; Macrobian Diagrams; Calcidian Diagrams; & Capellan Diagrams. Illus. This is a print on demand publication.

In the rapidly changing world of the early Middle Ages, depictions of the cosmos represented a consistent point of reference across the three dominant states--the Frankish, Byzantine, and Islamic Empires. As these empires diverged from their Greco-Roman roots between 700 and 1000 A.D. and established distinctive medieval artistic traditions, cosmic imagery created a web of visual continuity, though local meanings of these images varied greatly. Benjamin Anderson uses thrones, tables, mantles, frescoes, and manuscripts to show how cosmological motifs informed relationships between individuals, especially the ruling elite, and communities, demonstrating how domestic and global politics informed the production and reception of these depictions. The first book to consider such imagery across the dramatically diverse cultures of Western Europe, Byzantium, and the Islamic Middle East, Cosmos and Community in Early Medieval Art illuminates the distinctions between the cosmological art of these three cultural spheres, and reasserts the centrality of astronomical imagery to the study of art history.

In this selection of studies, J.L. Mancha explores aspects of the development of medieval optics and astronomy, including some medieval antecedents of the work of early modern astronomers. The articles deal with Latin, Hebrew and Arabic texts, and the process of translation and transmission of knowledge, and focus on three main themes. First, the theory and astronomical use of the pinhole camera in the 12th and 13th centuries; the texts edited here contain a solution to the problem of the formation of images cast by light through triangular apertures, equivalent to Kepler's, a description of the correct procedure for measuring solar apparent diameters using finite apertures, and a derivation of the Sun's eccentricity from its apparent diameters at apogee and perigee. Second, the characteristics of the Latin and Provençal versions of Levi ben Gerson's astronomical work, composed in collaboration with the author, as well as his tables and canons for finding syzygies and the mathematical methods used in the derivation of parameters. Third, different aspects of the survival of homocentric astronomy in the Middle Ages, especially al-Bitruji's model for trepidation and the technique for calculating the hippopede resulting from Eudoxan couples.

This title was first published in 2002: Before the introduction of Greco-Arabic mathematical astronomy in the 12th century, what astronomy was there in the medieval West? While we know of developments in computus, which calculated with solar and lunar cycles to create Christian calendars, and in monastic time-telling by the stars, was anything known of the five planets? Using glosses, commentaries, and diagrams to the early manuscripts of four classical Latin authors - Pliny, Macrobius, Martianus Capella, and Calcidius - Bruce Eastwood provides evidence for the extensive development of the sixth liberal art, astronomy, from the time of Charlemagne forward, with a particular focus on the diagrams used and invented by Carolingian and later scholars. Learning to understand the motions of planets in terms of spatial, or geometrical, arrangement, they mined these Roman writings for astronomical and cosmological doctrines, in the process not only absorbing but also creating models of planetary motions. What they accomplished over three centuries was to establish a basic set of models that showed the reasoned order of the planets in the heavens.

Eclipses have long been seen as important celestial phenomena, whether as omens affecting the future of kingdoms, or as useful astronomical events to help in deriving essential parameters for theories of the motion of the moon and sun. This is the first book to collect together all presently known records of timed eclipse observations and predictions from antiquity to the time of the invention of the telescope. In addition to cataloguing and assessing the accuracy of the various records, which come from regions as diverse as Ancient Mesopotamia, China, and Europe, the sources in which they are found are described in detail. Related questions such as what type of clocks were used to time the observations, how the eclipse predictions were made, and how these prediction schemes were derived from the available observations are also considered. The results of this investigation have important consequences for how we understand the relationship between observation and theory in early science and the role of astronomy in early cultures, and will be of interest to historians of science, astronomers, and ancient and medieval historians.