This discussion will be in two parts:
A. Please compose a post addressing each of the following. For each question, be sure to state the source of your information or evidence (e.g., the figure above, a textbook section or figure, etc.).
1) Describe how the universe changed in going from the Early Universe to the Universe Some Time Later. Include a description of what happens to the sizes of the galaxies (if anything). [Use the figure above to answer this question.]
2) Compare the amount that the distance between the D and C galaxies changed in comparison to the amount that the distance between the D and E galaxies changed. Which galaxy, C or E, appears to have moved farther from D? Which galaxy, C or E, has been moving away from D faster? [Use the figure above to answer this question.]
3) Imagine that you are in Galaxy D. Rank the A, B, C, and E galaxies in terms of their relative speeds away from you, from fastest to slowest. [Use the figure above to answer this question.]
4) Now imagine that you are in the E galaxy. Rank the A, B, C, and D galaxies in terms of their relative speeds away from you, from greatest to smallest. [Use the figure above to answer this question.]
5) Is there a relationship between an object’s distance away from you in the universe and the speed it would appear to be moving away from you? If so, describe this relationship.
6) Would your answer to Question 5 be true in general for all locations in the universe?
7) Consider the following statement: “Since all galaxies we observe are moving away from us, we must be at the center of the universe.” Do you agree or disagree? Explain your reasoning.
Nees it by tonight
Requirements: decent size | .doc file
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