In this activity students are asked to interpret a graph that represents the sunspot cycle from 1900 to 1990, then they are asked to graph the number of sunspots that occurred from 1995 to 2003 in order to understand...
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...
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...
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