Gravity and Orbits

This video does a great job of answering the question "Why doesn't the moon crash into Earth?"

EDC921

As I worked my way through Session 3, I came upon this site. At first glance, the links look as if they would be useful to this course. Let me know if you find any of them helpful!http://www.seedwiki.com/wiki/teaching_with_blogs/teaching_with_blogs.cfm