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Chapter 17 Homework

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Chapter 17: Astronomy Assignment


Reading: Astronomy, Chapter 17: the Nature of the Stars

WebLecture: Observing Stars: What we can learn from starlight

Planetarium Program: Carry out observing projects #76, 77 and #78.

Website of the Week: Read about the Gaia Mission, a follow-on mission to Hipparcos from the European Space Agency. Hipparcos ( the high precision parallax collecting satellite) operated between 1989 and 1993 into a geostationary transfer orbit. Because of a failure in a boost motor, it never reached its target orbit, but scientists were still able to gather data from it for over 3 1/2 years. The Gaia mission was scheduled to be launched in the summer of 2012 and placed into orbit at the Sun-Earth L2 Lagrangian point, but launch was delayed until 19 December 2013. Its mission is to create a precise three-dimensional map of stars throughout the Milky Way galaxy and determine their motions, luminosity, effect of temperature, gravity, and chemical composition.


Go over the list of Key Words and Key Ideas at the end of the chapter. If you don't remember the definition of the key word, review its use (the page number on which it is explained is given).

Read through the Review Questions and be prepared to discuss them in class. If any of them confuses you, ask about it!

Check the Moodle your Mastery Exercise.

Lab: Determining the distance to a star using parallax measurements

Moodle Quiz: Take the chapter quiz. Quizzes are generally due by the day after our next session (this gives you two chances to ask questions in class -- use the opportunity!).