Abraham Zacut (1452-1515) of Salamanca was an outstanding intellectual figure in the Spanish Jewish community on the eve of the expulsion in 1492. His scientific work began in the 1470s, & continued in exile, in Portugal, N. Africa, & ultimately in Jerusalem. This monograph focuses on some of his important contributions to astronomy, namely, those that appear in the book published in Leiria, Portugal, in 1496, generally known as the "Almanach Perpetuum"; this publication is to be distinguished from "ha-Hibbur ha-gadol" ("The Great Composition") that Zacut composed in Hebrew in 1478. Indeed, one of the findings in the course of research for this vol. is that these are distinct works. Bibliography. Charts & tables.
In On Both Sides of the Strait of Gibraltar Julio Samsó shows that astronomical sources, written in al-Andalus, the Maghrib and the Iberian Peninsula, belong to the same tradition and emphasizes the role of al-Andalus and the Iberian Peninsula in the transmission of Islamic astronomy to medieval Europe.
On 5 December 1496, King Manuel I signed the edict of expulsion affecting all Jews in Portugal, effective in 1497. In 1536, the Portuguese Inquisition was established, ending in 1821. These 324 years were centuries of unremitting difficulty for Jews, in Portugal itself as well as in any territory governed by Portugal. In 2015, Portugal offered dual nationality to Jews who had a connection to the country, with a path to citizenship. Portuguese requirements for citizenship differed significantly from a similar offer by Spain, making the Portuguese pathway, simpler and less complicated. This volume discusses my family's narrative showing my connection to Portugal and how I met each of the requirements for citizenship.
Abraham Zacut (1452-1515) of Salamanca was an outstanding intellectual figure in the Spanish Jewish community on the eve of the expulsion in 1492. His scientific work began in the 1470s, & continued in exile, in Portugal, N. Africa, & ultimately in Jerusalem. This monograph focuses on some of his important contributions to astronomy, namely, those that appear in the book published in Leiria, Portugal, in 1496, generally known as the "Almanach Perpetuum"; this publication is to be distinguished from "ha-Hibbur ha-gadol" ("The Great Composition") that Zacut composed in Hebrew in 1478. Indeed, one of the findings in the course of research for this vol. is that these are distinct works. Bibliography. Charts & tables.
The 12 articles of this volume show the many facets of contact in al-Andalus and Medieval Iberia, reminding us of how contact influenced art and learning in a wide range of fields: politics, science, philosophy, music and religion; offering views of how contact between societies affects both language, stereotype and assimilation; examining how war and conflict (re)define the representation of ideas, places and people; and demonstrating how representations changed over time through contact and conflict. Lessons of the past apply today as al-Andalus captures the modern imagination and cultures continue to come into contact across borders which either allow fluid diffusion of ideas or block passage.
This book describes and analyses, for the first time, the astronomical tables of Giovanni Bianchini of Ferrara (d. after 1469), explains their context, inserts them into an astronomical tradition that began in Toledo, and addresses their diffusion.
During the Middle Ages and early modern times tables were a most successful and economical way to present mathematical procedures and astronomical models and to facilitate computations. Before the sixteenth century astronomical models introduced by Ptolemy in Antiquity were rarely challenged, and innovation consisted in elaborating new methods for calculating planetary positions and other celestial phenomena. Essays on Medieval Computational Astronomy includes twelve articles that focus on astronomical tables, offering many examples where the meaning and purpose of such tables has been determined by careful analysis. In evaluating the work of medieval scholars we are mindful of the importance of applying criteria consistent with their own time, which may be different from those appropriate for other periods.
This carefully researched monograph is a historical investigation of the illustrated Aratea astronomical manuscript and its many interpretations over the centuries. Aratus' 270 B.C.E. Greek poem describing the constellations and astrological phenomena was translated and copied over 800 years into illuminated manuscripts that preserved and illustrated these ancient stories about the constellations. The Aratea survives in its entirety due to multiple translations from Greek to Latin and even to Arabic, with many illuminated versions being commissioned over the ages. The survey encompasses four interrelated disciplines: history of literature, history of myth, history of science, and history of art. Aratea manuscripts by their nature are a meeting place of these distinct branches, and the culling of information from historical literature and from the manuscripts themselves focuses on a wider, holistic view; a narrow approach could not provide a proper prospective. What is most essential to know about this work is that because of its successive incarnations it has survived and been reinterpreted through the centuries, which speaks to its importance in all of these disciplines. This book brings a better understanding of the history, changes and transmission of the original astronomical Phaenomena poem. Historians, art historians, astronomy lovers, and historians of astronomy will learn more specialized details concerning the Aratea and how the tradition survived from the Middle Ages. It is a credit to the poetry of Aratus and the later interpreters of the text that its pagan aspects were not edited nor removed, but respected and maintained in the exact same form despite the fact that all sixty Aratea manuscripts mentioned in this study were produced under the rule of Christianity.
This new volume of papers by Julio Samsó deals with the development of astronomy and astrology in al-Andalus and the Maghrib between the 10th and the 19th centuries. Opening with a survey of the social history of the exact sciences in al-Andalus, the book then looks at astronomical tables: the first stages of the introduction of al-Khwarizmi's and al-Battani's tables through the school of Maslama al-Majriti, the development of Ibn al-Zarqalluh/ Azarquiel's theories in Maghribi zijes (Ibn al-Banna' and Ibn Azzuz) and the abandonment of this tradition towards the end of the 14th century. From this period onwards new Eastern zijes (Muhyi al-Din al-Maghribi, Ibn al-Shatir, Ulugh Beg) are introduced in the Maghrib and, towards the beginning of the 17th century, a translation of Abraham Zacut and José Vizinho's Almanach Perpetuum (end of the 15th century) becomes well known in the whole Islamic world, from Morocco to the Yemen. As well as zijes themselves, the author also deals with theoretical astronomy (the use of an elliptical deferent for Mercury in Ibn al-Zarqalluh's equatorium and the criticisms of Ibn al-Haytham and Jabir b. Aflah on Ptolemy's determination of the parameters of the same planet), and with the use of zijes for the calculation of horoscopes, and an experimental astrological method for the correction of mean motion planetary tables (Ibn Azzuz).
This volume presents comprehensive investigations into various facets of observational astronomy during the medieval Islamic period, spanning from the ninth to the seventeenth centuries. The chapters compiled here, originally published between 2012 and 2018, have undergone significant revisions to enhance their accuracy and explore a broad spectrum of topics organized into five main sections. Reflections on Observational Astronomy in the Medieval Islamic Period begins with solar astronomy, providing a detailed evaluation of Islamic astronomers’ determinations of fundamental solar parameters. In the realm of lunar astronomy, it examines the gradual endorsement and rationalization of annular solar eclipses, along with an exclusive historical account of predicting and observing such an event in 1283 CE. The section on planetary astronomy scrutinizes empirical discoveries that distinguish between the precession of equinoxes and the motion of apogees, as well as significant enhancements to Ptolemy’s parameters for planetary latitudes. Stellar astronomy is explored through a non-Ptolemaic star table that encompasses observations from ninth-century Baghdad to thirteenth-century Marāgha. The final section examines observational instruments, focusing on those constructed during the second period of activities at the Marāgha observatory. A critical analysis of astronomical observations conducted at the Marāgha and Istanbul observatories is a key focus of this work. This book will be invaluable to those interested in the historical progression of exact sciences; the scope, distinctive aspects, and caliber of experimental activities in medieval times; and the interplay between theory and observation throughout history. It is intended for historians, scientists (including astronomers and physicists), and particularly, historians of astronomy.
