Oddbjørn Engvold (Author)
Jack B. Zirker (Author)
Galileo Galilei and Christoph Scheiner, working independently, discovered many of the properties of sunspots that we accept as valid today. Using his precise drawings of sunspots, Scheiner discovered seasonal variations in the slope of sunspot tracks. These led him to measure a small inclination of the solar axis with respect to the ecliptic plane. Galileo interpreted the variations of sunspot tracks as strong evidence in support of the Copernican model of the planets and Sun. Scheiner, in contrast, sought to reconcile his discoveries with his belief in Church dogma. He rejected the Copernican model and adopted instead Tycho Brahe’s hybrid geocentric model, which was consistent with all pertinent observations.
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Article
Reeves, Eileen;
(2007)
Mere Projections: Sunspots and the “Camera Obscura”
(/isis/citation/CBB000931275/)
Essay Review
Franco Giudice;
(2007)
Only a Matter of Credit? Galileo, the Telescopic Discoveries, and the Copernican System
(/isis/citation/CBB386449739/)
Essay Review
Renata Ago;
(2007)
Suggestioni per la storia sociale: distanza geografica, incompletezza delle informazioni e segretezza nella comunicazione scientifica di Galileo
(/isis/citation/CBB252029371/)
Article
Ingaliso, Luigi;
(2013)
Mater una vera, veritas una phaenomeni est: la theorica Solis nella Rosa Ursina di Christoph Scheiner
(/isis/citation/CBB001450815/)
Article
Franz Daxecker;
(2018)
Eine retrospektive chronobiologische Untersuchung der Sonnenfleckenzyklen bei Christoph Scheiner
(/isis/citation/CBB409939310/)
Book
Christopher M. Graney;
(2015)
Setting Aside All Authority: Giovanni Battista Riccioli and the Science against Copernicus in the Age of Galileo
(/isis/citation/CBB105870551/)
Book
Luís Miguel Carolino;
(2023)
Geo-heliocentric controversies : the Jesuits, Tycho Brahe and the confessionalisation of science in seventeenth-century Lisbon
(/isis/citation/CBB049554963/)
Article
Mayer, Thomas F.;
(2011)
The Censoring of Galileo's Sunspot Letters and the First Phase of His Trial
(/isis/citation/CBB001024136/)
Article
Boulier, Philippe;
(2013)
L'inaltérabilité du ciel pose un problème théologique
(/isis/citation/CBB001450816/)
Article
Reeves, Eileen A.;
Albert Van Helden;
(2018)
Idiom and Image: Translating the Letters on Sunspots
(/isis/citation/CBB623384315/)
Article
Lewis, John;
(2007)
Truth and Propaganda in Images of the Trial of Galileo
(/isis/citation/CBB000771285/)
Article
Owens, Brian;
(2013)
Long-term Research: Slow Science
(/isis/citation/CBB001320432/)
Book
Hofstadter, Dan;
(2009)
The Earth Moves: Galileo and the Roman Inquisition
(/isis/citation/CBB001033189/)
Book
Christopher M. Graney;
(2017)
Mathematical Disquisitions: The Booklet of Theses Immortalized by Galileo
(/isis/citation/CBB733373633/)
Book
Christopher M. Graney;
(2017)
Mathematical Disquisitions: The Booklet of Theses Immortalized by Galileo
(/isis/citation/CBB464227184/)
Book
Galilei, Galileo;
Reeves, Eileen;
Helden, Albert Van;
Scheiner, Christoph;
(2010)
On Sunspots
(/isis/citation/CBB001020067/)
Article
Reeves, Eileen;
(2005)
Speaking of Sunspots: Oral Culture in an Early Modern Scientific Exchange
(/isis/citation/CBB000850141/)
Article
Galluzzi, Paolo;
(2014)
Spotted Felines and the Spotted Sun: The Lincei and Galileo's Istoria
(/isis/citation/CBB001510282/)
Article
Giudice, Franco;
(2014)
Galileo's Cosmological View from the Sidereus Nuncius to Letters on Sunspots.
(/isis/citation/CBB001510283/)
Essay Review
Boulier, Philippe;
(2012)
The Debate on Sunspots
(/isis/citation/CBB001566611/)
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