Introduction
Sunspots before the telescope
Harriot and Fabricius
Christoph Scheiner
Tres epistolae
Galileo answers
Galileo's first letter
Galileo's second letter
A more accurate inquiry from Ingolstadt
Accuratior disquisitio
Galileo responds and goes into print
Galileo's third letter
Rematch, 1630-1632
Appendices
Scheiner and Galileo on the nature of the moon
Galileo to Maffeo Cardinal Barberini
Carlo Cardinal Conti to Galileo on scripture
Scheiner's calculation of the transit of Venus
Galileo's demonstrations
Front matter of Istoria e dimostrazioni intorno alle macchie solari e loro accidenti.
On sunspots by Galileo Galilei. ISBN 9780226707167. Published by University of Chicago Press in 2010. Publication and catalogue information, links to buy online and reader comments.