![\"A](\"https:\/\/www.newsbeep.com\/il\/wp-content\/uploads\/2026\/03\/a-copy-of-the-almagest-annotated-by-galileo-galilei-credit-national-central-library-of-florence.jpg\")
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A copy of the Almagest annotated by Galileo Galilei. Credit: National Central Library of Florence<\/a><\/p>\n A historian has identified Galileo\u2019s handwritten notes in a rare 16th-century copy of one of history\u2019s most influential astronomy books. The discovery includes marginal comments and a handwritten biblical passage<\/a>, offering new insight into how the scientist studied earlier theories of the universe.<\/p>\n Historian Ivan Malara made the discovery in January while examining a 1551 Latin edition of The Almagest at Italy\u2019s National Central Library of Florence. The work, written in the second century by ethnically Greek astronomer and mathematician Ptolemy<\/a>, describes a geocentric system that places Earth at the center of the cosmos. The model shaped Western astronomy for more than 1,400 years.<\/p>\n While reviewing several early printings of the book, Malara noticed a blank page that contained a handwritten copy of Psalm 145. The handwriting resembled that of Galileo Galilei. As Malara continued examining the volume, he found dense notes in the margins that appeared to match the astronomer\u2019s script.<\/p>\n Scholars confirm Galileo\u2019s handwritten notes in historic astronomy book<\/p>\n Malara later concluded that Galileo likely wrote the annotations around 1590, years before his famous telescope observations of the Moon and Jupiter. The notes suggest that the young scientist studied Ptolemy\u2019s work<\/a> closely before developing ideas that later supported a sun-centered model of the universe.<\/p>\n HISTORIA DE LA CIENCIA \ud83d\udd2d\ud83d\udcdc \u2014 Jose Ramos Vivas (@joseramosvivas) March 4, 2026<\/a><\/p>\n Malara contacted leading Galileo scholars to verify the finding. Michele Camerota, a historian at the University of Cagliari, reviewed the evidence and stated that the attribution to Galileo appears secure.<\/p>\n Specialists connected with the Galileo Museum and the Florentine library also compared the handwriting, abbreviations, and annotation style with known Galileo manuscripts and found strong similarities.<\/p>\n Discovery offers insight into Galileo\u2019s early scientific thinking<\/p>\n Some comments in the margins closely resemble arguments Galileo used in his own writings from the same period. The biblical passage also gained context through historical references.<\/p>\n Malara found that another 16th-century copy of The Almagest contains a note stating that Galileo prayed before studying the text. A letter written in 1673 by mathematician Alessandro Marchetti also described Galileo praying before reading the book.<\/p>\n The annotations show that Galileo once examined Ptolemy\u2019s geocentric model in detail. Today, the scientist is widely known for defending Nicolaus Copernicus\u2019 heliocentric theory, which states that Earth and other planets orbit the sun. His support for that view led to conflict with the Catholic Church<\/a> and resulted in his house arrest in 1633.<\/p>\n Historians say the discovery suggests Galileo had a strong understanding of the mathematical arguments behind earlier astronomy.<\/p>\n Malara plans to publish a detailed study of the annotations in the Journal for the History of Astronomy<\/a>, where the research will examine Galileo\u2019s handwritten notes and their role in shaping his scientific thinking.<\/p>\n
Se han hallado notas manuscritas de Galileo Galilei en un ejemplar del siglo XVI del Almagesto.
\u200bEste descubrimiento es una ventana \u00fanica a la mente del genio \ud83e\udde0 antes de que iniciara la revoluci\u00f3n cient\u00edfica. Es fascinante ver c\u00f3mo el hombre que\u2026 pic.twitter.com\/o7WRRzgASb<\/a><\/p>\n