Cosmic Perspective, The, Books a la Carte Edition (8th Edition)
Cosmic Perspective, The, Books a la Carte Edition (8th Edition)
8th Edition
ISBN: 9780134110318
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 20, Problem 5VSC

Use the following questions to check your understanding of some of the many types of visual information used in astronomy. For additional practice, try the Chapter 20 Visual Quiz at MasteringAstronomy*.

Chapter 20, Problem 5VSC, Use the following questions to check your understanding of some of the many types of visual

The schematic diagram above (repeated from Figure 20.22) shows the techniques that are best suited to measuring various astronomical distances. Answer the following questions based on the information in the figure.

5. Which technique is best for measuring the distances of nearby galaxies?

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Why are so many astronomical objects in the universe flat today? (Like the solar system, Saturn's ring, black hole accretion discs) Let's focus on our galaxy. Originally, the galaxy was a huge spherical cloud of gas and dust, much larger than it is today, and rotating much more slowly. Explain using gravity and the conservation of angular momentum, why the galaxy today is a flat disc that rotates faster.
2. List 3 methods used to measure cosmic distances - choose 1 of the techniques and briefly explain in 1-2 sentences how astronomers use this method to calculate cosmic distance.
) what are some fundamental properties of late type galaxies that our theories of galaxy formation must reproduce? 2.) what are some fundamental properties of early type galaxies that our theories of galaxy formation must reproduce?

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Cosmic Perspective, The, Books a la Carte Edition (8th Edition)

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