Chapter

Galileo answers Apelles

in On Sunspots

Published by University of Chicago Press

Published in print October 2010 | ISBN: 9780226707150
Published online March 2013 | e-ISBN: 9780226707174 | DOI: http://dx.doi.org/10.7208/chicago/9780226707174.003.0006
Galileo answers Apelles

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This chapter discusses Galileo's reply to the commentaries of Christoph Scheiner on his sunspot study. It explains that Galileo's first response contained no series of systematic observations like the Tres Epistolae. This is because it was only after this first letter that Galileo learned the telescopic projection method from Benedetto Castelli which allowed him to conduct systemic observation of the Sun. Galileo promised to provide observations and drawings of the solar spots in his next letter. During this time Scheiner was already preparing his Accuratior Disquisitio for publication.

Keywords: Galileo; Christoph Scheiner; systematic observation; Tres Epistolae; telescopic projection method; Benedetto Castelli; Accuratior Disquisitio

Chapter.  4488 words.  Illustrated.

Subjects: History of Science and Technology

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