The Jesuit Sunspot Book That Was Half a Major Astronomical Treatise and Half a Sustained Attack on Galileo
Christoph Scheiner's *Rosa Ursina sive Sol* (1626–1630) ran to about 780 folio pages, contained the most accurate pre-19th-century star catalogue of the Sun's surface, and devoted hundreds of pages to attacking Galileo's claim to have discovered sunspots first. The priority dispute substantially poisoned the European astronomical mainstream for two decades.
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