Young students can find the world of college physics difficult at times, and it's always good to have a wide range of instructional materials on hand in case they need them. The University of Tennessee's Physics Department has placed a number of these materials online, and this particular resource deals with the course Astronomy 162, which covers stars, galaxies, and cosmology. On the site, students and educators will be delighted to find twenty-eight separate sections that cover this material through illustrations, animations, and written explanations. Some of the specific topics covered here include the properties of light, energy production in stars, and stellar motion. Overall, it's a great way for students to refresh their knowledge of these subjects, and educators can draw on some of these materials for their own lessons.