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| Almagestum Novum | |
|---|---|
| Name | Almagestum Novum |
| Author | Giovanni Battista Riccioli |
| Language | Latin |
| Pub date | 1651 |
| Genre | Astronomical treatise |
| Country | Papal States |
Almagestum Novum is a comprehensive seventeenth‑century astronomical treatise compiled and published in 1651 by the Jesuit astronomer Giovanni Battista Riccioli in Bologna. The work synthesizes observational programs, theoretical debates, and instrument design amid controversies involving figures such as Galileo Galilei, Johannes Kepler, Tycho Brahe, Christiaan Huygens, and Nicolaus Copernicus, and it was produced in the milieu of institutions like the Society of Jesus, University of Padua, Accademia dei Lincei, Royal Society, and University of Bologna. The volume engaged controversies over cosmological systems associated with Ptolemy, Copernicus, Tycho Brahe, and proponents in courts such as Medici, Habsburg Netherlands, and Spanish Empire.
Riccioli wrote in Latin during the aftermath of disputes involving Galileo, the Congregation of the Index, the Roman Inquisition, and patrons tied to the House of Este and House of Bourbon. Influences on his methodology included correspondence and polemics with Christoph Scheiner, Giovanni Battista Zupi, Francesco Maria Grimaldi, Johann Hevelius, Marin Mersenne, and observers associated with the Vatican Observatory and the Observatoire de Paris networks. Riccioli combined instruments and data from makers such as Giovanni Campani, references to designs by Tycho Brahe and Galileo Galilei, and engagement with mathematical treatises like those of Euclid, Apollonius of Perga, Kepler's Epitome, and Clavius.
The work is organized in multiple books that mirror classical compilations such as Ptolemy's Almagest and renaissance encyclopedias used at institutions like University of Padua and University of Bologna. Riccioli arranged material into observational catalogs, debates on cosmologies drawn from Copernicus and Tycho Brahe, lunar mapping influenced by Francesco Maria Grimaldi and Johann Hevelius, sections on planetary tables invoking Kepler and Tycho Brahe, and appendices addressing instrument construction related to Galileo Galilei and Christiaan Huygens. Illustrations and maps in the volume reference conventions used by Gerardus Mercator, Abraham Ortelius, and Jodocus Hondius, while mathematical expositions draw on works by Euclid, Archimedes, and Stevinus.
Riccioli presented precise telescopic measurements of lunar features, compiling selenographic nomenclature that engaged the toponymy debates involving Francesco Maria Grimaldi and later commentators like Johann Hevelius and Johannes Hevelius. He tabulated observational data bearing on planetary motions, referencing models from Ptolemy, Nicolaus Copernicus, Johannes Kepler, and Tycho Brahe, and applied geometrical methods rooted in Euclid and Apollonius of Perga while engaging mathematical techniques found in works by Simon Stevin and Bonaventura Cavalieri. Instrumental innovations discussed include improvements to telescopes and sighting devices associated with Giovanni Battista Zupi, Christiaan Huygens, Galileo Galilei, and maker guilds in Bologna. Riccioli's empirical arguments addressed phenomena later central to debates involving Isaac Newton and Robert Hooke, particularly the question of relative motion and observational signatures distinguishing heliocentric and geoheliocentric schemes advanced by Tycho Brahe and defenders in the Society of Jesus.
The treatise provoked responses across scholarly networks including the Accademia dei Lincei, the Royal Society, the Paris Observatory circle, and universities in Leiden, Padua, Paris, and Oxford. Critics and supporters referenced Riccioli alongside figures such as Galileo Galilei, Christiaan Huygens, Johannes Kepler, Isaac Newton, Marin Mersenne, Giovanni Battista Zupi, and Johann Hevelius. The work influenced mapmakers, instrument makers, and pedagogues at institutions like University of Bologna and seminaries of the Society of Jesus, and it was cited in polemical literature associated with episodes like the Galileo affair and the broader reception history of Copernicanism. Contemporary reactions ranged from approbation in Jesuit circles tied to Clavius to critique by proponents of mathematical reform such as Christiaan Huygens and Isaac Newton.
The original 1651 Latin edition circulated among libraries connected to the Vatican Library, Bodleian Library, Bibliothèque Nationale de France, Leiden University Library, and private collections of patrons like the Medici Grand Dukes. Subsequent references and partial translations appeared in correspondence among Marin Mersenne, Christiaan Huygens, Johann Hevelius, and Samuel Hartlib, and later historians consulted copies held in archives associated with the Jesuit order, University of Bologna, and the Royal Society. Modern critical editions and analyses have been produced by scholars working in traditions of the History of Science at institutions such as Harvard University, University of Cambridge, University of Leiden, Max Planck Institute for the History of Science, and University of Padua.
Modern scholarship situates Riccioli's work within historiographies that reference Galileo Galilei, Nicolaus Copernicus, Tycho Brahe, Johannes Kepler, Christiaan Huygens, Isaac Newton, and institutional actors like the Society of Jesus, Accademia dei Lincei, and the Royal Society. Researchers in the fields of the History of Astronomy, History of Science, and institutional studies at centers such as Cambridge University Press, Oxford University Press, Max Planck Institute, and university departments in Italy, France, United Kingdom, and United States examine Riccioli's empirical methods, selenography, and his role in debates over cosmological models. The Almagestum Novum remains a primary source for studies of seventeenth‑century observations cited alongside archives from the Vatican Secret Archives, Royal Society Archives, and manuscript collections at Bibliothèque Nationale de France.
Category:17th-century books Category:Astronomy books Category:History of astronomy