Poetry of the sky and stars.

Marcus Manilius, who lived in the reigns of Augustus and Tiberius, is the author of the earliest treatise on astrology we possess. His Astronomica, a Latin didactic poem in five books, begins with an account of celestial phenomena, and then proceeds to treat of the signs of the zodiac and the twelve temples; there follow instructions for calculating the horoscoping degree, and details of chronocrators, decans, injurious degrees, zodiacal geography, paranatellonta, and other technical matters. Besides exhibiting great virtuosity in rendering mathematical tables and diagrams in verse form, the poet writes with some passion about his Stoic beliefs and shows much wit and humor in his character sketches of persons born under particular stars. Perhaps taking a lead from Virgil in his Georgics, Manilius abandons the proportions of his last book to narrate the story of Perseus and Andromeda at considerable length.

In spite of its undoubted elegance, the Astronomica is a difficult work, and this edition provides in addition to the first English prose translation a full guide to the poem, with copious explanatory notes and illustrative figures.

Girolamo Cardano was an Italian doctor, natural philosopher, and mathematician who became a best-selling author in Renaissance Europe. He was also a leading astrologer of his day, whose predictions won him access to some of the most powerful people in sixteenth-century Europe. In Cardano’s Cosmos, Anthony Grafton invites readers to follow this astrologer’s extraordinary career and explore the art and discipline of astrology in the hands of a brilliant practitioner.

Renaissance astrologers predicted everything from the course of the future of humankind to the risks of a single investment, or even the weather. They analyzed the bodies and characters of countless clients, from rulers to criminals, and enjoyed widespread respect and patronage. This book traces Cardano’s contentious career from his first astrological pamphlet through his rise to high-level consulting and his remarkable autobiographical works. Delving into astrological principles and practices, Grafton shows how Cardano and his contemporaries adapted the ancient art for publication and marketing in a new era of print media and changing science. He maps the context of market and human forces that shaped Cardano’s practices—and the maneuvering that kept him at the top of a world rife with patronage, politics, and vengeful rivals.

Cardano’s astrology, argues Grafton, was a profoundly empirical and highly influential art, one that was integral to the attempts of sixteenth-century scholars to understand their universe and themselves.

This study is the first to examine the important political role played by astrology in Italian court culture. Reconstructing the powerful dynamics existing between astrologers and their prospective or existing patrons, The Duke and the Stars illustrates how the “predictive art” of astrology was a critical source of information for Italian Renaissance rulers, particularly in times of crisis. Astrological “intelligence” was often treated as sensitive, and astrologers and astrologer-physicians were often trusted with intimate secrets and delicate tasks that required profound knowledge not only of astrology but also of the political and personal situation of their clients. Two types of astrological predictions, medical and political, were taken into the most serious consideration. Focusing on Milan, Monica Azzolini describes the various ways in which the Sforza dukes (and Italian rulers more broadly) used astrology as a political and dynastic tool, guiding them as they contracted alliances, made political decisions, waged war, planned weddings, and navigated health crises.

The Duke and the Stars explores science and medicine as studied and practiced in fifteenth-century Italy, including how astrology was taught in relation to astronomy.

Classic astrology.

The Tetrabiblos of the famous astronomer and geographer Claudius Ptolemaeus (ca. AD 100–178) of Egypt consists of four books, the title given in some manuscripts meaning “Mathematical Treatise in Four Books,” in others “The Prognostics addressed to Syrus.” The subject is astrology, which in Ptolemy’s time as down to the Renaissance was fused as a respectable science with astronomy. Translations and commentaries are few, and only three Greek texts had been printed (all in the 16th century) before the present one and the one begun by F. Boll and finished by Emilie Boer in 1940.