Galileo’s Hidden Annotations Reframe His Leap from Ptolemy to Copernicus
TL;DR Summary
An Italian historian has found a 1551 copy of Ptolemy’s Almagest with notes in likely Galileo’s handwriting, dated around 1590 and confirmed by handwriting experts, suggesting Galileo used Ptolemy’s mathematical framework to develop Copernican ideas rather than reject ancient wisdom outright; the find is to be studied further in the Journal for the History of Astronomy and highlighted by the National Central Library of Florence.
- Historian Finds Copy of 16th-Century Astronomy Textbook—Belonging to Galileo Gizmodo
- A Scholar Recognized the Inscriptions in the Margins of This Manuscript. The Scribbles Turned Out to Be Galileo's Handwritten Notes Smithsonian Magazine
- Science Reports Galileo’s Notes Reveal Nuance In Shift From Earth-Centered Cosmos Quantum Zeitgeist
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