Cosmology is a challenging topic. No single lesson can really do the topic justice, but you should have at least a foundation now that you can use if you do follow-up reading on your own. Discoveries related to dark energy may continue to happen in the next few years, so you may want to keep an eye out for those, in particular.
First, please take the Web-based Lesson 10 quiz.
Good luck!
For this activity, I want you to reflect on what we've covered in this lesson and to speculate about the Big Bang. Since this is a discussion activity, you will need to enter the discussion forum more than once in order to read and respond to others' postings.
You will be graded on the quality of your participation. See the grading rubric [1] for specifics on how this assignment will be graded.
During this week, you should complete the work you began on lab 3 last week.
You have finished the reading for Lesson 10. Double-check the list of requirements on the Lesson 10 Overview page to make sure you have completed all of the activities listed there before beginning the next lesson.