Astronomy
Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Chapter 25, Problem 2E

Explain where in a spiral galaxy you would expect to find globular clusters, molecular clouds, and atomic hydrogen.

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Globular clusters revolve around the Galaxy in highly elliptical orbits. Where would you expect the clusters to spend most of their time? (Think of Kepler’s laws.) At any given time, would you expect most globular clusters to be moving at high or low speeds with respect to the center of the Galaxy? Why? (If you would like to learn more about globular clusters, read Section 22.2 of the book, though it is not necessary to answer this question)
Identify a feature of the Whirlpool Galaxy that is visible in all several types of light. Explain what this means
How astronomers determine the distance of a galaxy? Explain.

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