Week 2 module is activated.

1. The Week 2 learning module is now active. Look on the home page for the cup of coffee icon for the folder of all learning modules.
2. More concept guides are in the Week 2 learning module. They are your study priority.
3. In the Week 2 learning module are some extra study tools:
   1. A spec sheet comparing Mars to Earth, which lets you see how the value of g on Earth's surface, 9.8 m/sec², compares to Mars. It's a PDF file.
   2. A prep tool to help you see what my exam questions can be like. It is a leftover mini-review from my spring 2009 lecture section. It's a set of 4 linked HTML pages.
4. Note: if you haven't noticed already, some of the textbook materials work with a rounded off value of g, 10 m/sec². Some of the text materials use a more precise value of 9.8 m/sec². I always use 9.8 m/sec² in exams!
5. I will probably release Writing Assignment 0 instructions over the weekend. To get ready for it, read and think about that article from Nature about the gravitational tractor. What do you find interesting or intriguing in that article?
6. Post substantive questions in the Discussion areas for chapters 2-4 and for chapter 5. I will coach you along there in Discussions.