Galileo’s handwritten notes found in ancient astronomy text

Around 1590, Galileo Galilei filled the margins of a copy of Ptolemy’s The Almagest with his musings — and they have just been rediscovered. Historian Ivan Malara recognized the storied astronomer’s handwriting in the book, which was held in a library in Florence. The contents, including a transcribed psalm, could shed light on the intellectual origins of Galileo’s groundbreaking view of the Solar System.