Galileo used his telescope to gather data about the heavens, and his observations and theories sparked much controversy. This video segment discusses Galileo's observations of sunspots, which challenged the current...
This tutorial traces the history of the telescope, beginning with Galileo's first small refractor, to the era of orbiting space telescopes. Topics include Galileo's trouble with the church over the observations he made...
This resource guide on Galileo from the Astronomical Society of the Pacific provides a number of general books and articles, as well as websites and videos, for a variety of audiences (from children to adults). A list...
Before the 17th century, people generally believed that Earth was at the center of the universe, a system originally developed by Ptolemy. Galileo, however, was not afraid to challenge existing beliefs when he published...
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