On Sunspots ih mohmjinm GALILEO GALILEI & CHRISTOPH SCHEINER Translated & introduced by Eileen Reeves & Albert Van Helden The University of Chicago Press :: Chicago & London Eileen Reeves is professor of comparative literature at Princeton University. Albert Van Helden is professor of the history of science at the University of Utrecht and the transla- tor of Galileo’s Sidereus Nuncius, also published by the University of Chicago Press. Th e University of Chicago Press, Chicago 60637 Th e University of Chicago Press, Ltd., London © 2010 by Th e University of Chicago All rights reserved. Published 2010 Printed in the United States of America 19 18 17 16 15 14 13 12 11 10 1 2 3 4 5 ISBN-13: 978-0-226-70715-0 (cloth) ISBN-10: 0-226-70715-6 (cloth) ISBN-13: 978-0-226-70716-7 (paper) ISBN-10: 0-226-70716-4 (paper) Library of Congress Cataloging-in-Publication Data Galilei, Galileo, 1564–1642. On sunspots / Galileo Galilei and Christoph Scheiner ; translated and introduced by Eileen Reeves and Albert Van Helden. p. cm. Includes bibliographical references and index. Summary: “A history of the controversy over sunspots with translations of the letters contained in Galileo’s Istoria e dimostrazioni intorno alle macchie solari e loro accidenti. Th e material that was added during the printing of the Istoria, the dedication, preface, laudatory poems, and the note from the printer to introduce Scheiner’s tracts, have been added in an appendix.” Provided by publisher. ISBN-13: 978-0-226-70715-0 (cloth : alk. paper) ISBN-10: 0-226-70715-6 (cloth : alk. paper) ISBN-13: 978-0-226-70716-7 (pbk. : alk. paper) ISBN-10: 0-226-70716-4 (pbk. : alk. paper) 1. Sunspots—Early works to 1800. I. Reeves, Eileen Adair. II. Van Helden, Albert. III. Scheiner, Christoph, 1575–1650. Tres epistolae. English. IV. Scheiner, Christoph, 1575–1650. Accuratior disquisitio. English. V. Galilei, Galileo, 1564–1642. Istoria e dimostrazioni intorno alle macchie solari e loro accidenti. English. VI. Title. QB525.G22 2010 523.7'4—dc22 2009042191 Th e paper used in this publication meets the minimum requirements of the American National Standard for Information Sciences—Permanence of Paper for Printed Library Materials, ANSI Z39.48-1992..