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On Sunspots - Chicago Scholarship Online
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On Sunspots

Galileo Galilei and Christoph Scheiner


Galileo's telescopic discoveries, and especially his observation of sunspots, caused great debate in an age when the heavens were thought to be perfect and unchanging. Christoph Scheiner, a Jesuit mathematician, argued that sunspots were planets or moons crossing in front of the Sun. Galileo, on the other hand, countered that the spots were on or near the surface of the Sun itself, and he supported his position with a series of meticulous observations and mathematical demonstrations that eventually convinced even his rival. This book collects the correspondence that constituted the public deba ... More

Keywords: Galileo, telescope, sunspots, Christoph Scheiner, planets, Sun, public debate

Bibliographic Information

Print publication date: 2010 Print ISBN-13: 9780226707150
Published to Chicago Scholarship Online: March 2013 DOI:10.7208/chicago/9780226707174.001.0001


Affiliations are at time of print publication.

Galileo Galilei, author

Christoph Scheiner, author