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The table included in the Disputatio Astronomica, the short booklet published anonymously in February 1619 in Rome, represents an important cartographic document testifying the observations of the three comets that appeared in 1618. The author of this booklet was shortly identified with the mathematics teacher of the Roman College, the Jesuit Orazio Grassi (1583–1654), who was involved in a controversy with Galileo and his pupil Mario Guiducci. A new analysis of the five illustrations included in the table—three star maps and two geometric schemes—is provided. Some manuscript drawings, recently discovered in a printed copy of the Disputatio, related to the observations of two of the three comets are presented.

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The Astronomical Charts of the Jesuits: The Table of De Tribus Cometis Years MDCXVIII Disputatio Astronomica

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  • 发表日期：

    2026年

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  • Giancarlo Truffa

摘要

The table included in the Disputatio Astronomica, the short booklet published anonymously in February 1619 in Rome, represents an important cartographic document testifying the observations of the three comets that appeared in 1618. The author of this booklet was shortly identified with the mathematics teacher of the Roman College, the Jesuit Orazio Grassi (1583–1654), who was involved in a controversy with Galileo and his pupil Mario Guiducci. A new analysis of the five illustrations included in the table—three star maps and two geometric schemes—is provided. Some manuscript drawings, recently discovered in a printed copy of the Disputatio, related to the observations of two of the three comets are presented.