** **

**Class
#12 (Feb. 14) Reading Questions - The Dark Side of the Universe**

**Chapter
10**

1. What was Einstein's "greatest
blunder" and what lead him to make this "blunder"?

2. What is the Einstein-de Sitter model
for the universe and what is the Omega for this model?

3.
What was the "age problem" that prompted the Lematire and Eddington
models for the universe?

4.
Describe the three methods used to determine the age of old stars and give the
currently accepted value for the age of the oldest stars.

5.
What is the Lambda-CDM model?

**Your
Question:** Please give a well formulated question
that you have regarding the material covered in this reading assignment.