ASTRO 801
Planets, Stars, Galaxies, and the Universe

Summary

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Astronomers regard everything we can observe as potential tools for us to use to learn even more about the Universe. Both star clusters and variable stars are useful to confirm our theoretical models for the evolution of stars. We can do this in the case of star clusters, because we can assume the cluster stars were all born at the same time. Variable stars help confirm our models for the physics of stars, but are most useful as distance indicators that we can use to expand our knowledge of the size scale of the Universe.

Activity 1 - Quiz

Directions

First, please take the Web-based Lesson 7 quiz.

  1. Go to Canvas.
  2. Go to the "Lesson 7 Quiz" and complete the quiz.
Good luck!

Activity 2 - Lab

Directions

During this week, you should complete work on the lab exercise you began during Lesson 5.

  1. Under Lesson 7 in the Course Outline box (see menu bar at left), click on "Lab 2, Part 2."
  2. Perform the data analysis and calculations, and then write answers to the questions.
  3. Submit your work to the Canvas dropbox called "Lab 2."

Reminder - Complete all of the lesson tasks!

You have finished the reading for Lesson 7. Double-check the list of requirements on the Lesson 7 Overview page to make sure you have completed all of the activities listed there before beginning the next lesson.

Tell us about it!

If there is anything you'd like to comment on, or add to, the lesson materials, feel free to post your thoughts below. For example, what did you have the most trouble with in this lesson? Was there anything useful here that you'd like to try in your own classroom?