Sixteenth century Italy produced a genius who marked the world with his studies and hypotheses about mathematical, physical and astronomical truths. His father, musician Vincenzio Galilei said, "Truth is not found behind a man's reputation. Truth appears only when the answers to questions are searched out by a free mind. This is not the easy path in life but it is the most rewarding." Galileo challenged divine law and the physics of Aristotle, and questioned everything in search of truths. And it was through this quest for truth that he was able to establish a structure for modern science.

Rosen, Sidney

Sidney Rosen (1916-2005) was born in Boston and graduated with a bachelor's degree from the University of Massachusetts and a PhD from Harvard University. He gained tenure at the University of Illinois, where he taught in the astronomy department for nearly forty years. His first popular children's book was about Galileo. Among his many contributions to children's literature since, Rosen authored a number of illustrated children's books, such as Where Does the Moon Go?, Can You Catch a Falling Star?, Which Way to the Milky Way?, and How Far Is a Star? With his wife, Dorothy Rosen, he coauthored a mystery series featuring Belle Appleman, a Jewish immigrant from Boston's West End.