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12 Fascinating Facts About Galileo Galilei You May Not Know | Discover Magazine
Galileo - Scientific Revolution, Sunspots, Moon's Surface, and Moons of Jupiter | Britannica
Galileo and the Telescope | Modeling the Cosmos | Articles and Essays | Finding Our Place in the Cosmos: From Galileo to Sagan and Beyond | Digital Collections | Library of Congress
Galileo's telescope: Let's hear it for inventors and toolmakers | Astronomy | The Guardian