A man driven by curiosity and the search for scientific truth, Galileo Galilei made profound discoveries and advancements across several scientific fields. This biography introduces upper elementary and middle grader readers to his life and astonishing accomplishments. Recognizing the importance of investigating and testing the scientific explanations that many held, Galileo performed experiments to test many ancient beliefs regarding science. This work highlights some of these experiments and his many groundbreaking inventions and observations. Demonstrating courage, Galileo published his findings concerning a heliocentric solar system and was immediately persecuted and misunderstood for presenting challenges to the geocentric model. Engaging and easy to read, this work is an excellent choice for introducing older readers to this brilliant man of science.