Astronomy
Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Chapter 25, Problem 12E

Consider the following five kinds of objects: open cluster, giant molecular cloud, globular cluster, group of O and B stars, and planetary nebulae.

A. Which occur only in spiral arms?

B. Which occur only in the parts of the Galaxy other than the spiral arms?

C. Which are thought to be very young?

D. Which are thought to be very old?

E. Which have the hottest stars?

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If you want to find a sizeable collection of Population Il stars in the Milky Way Galaxy, where would be a good place to look? A. near the Sun B. in a globular cluster high above the Galaxy's disk C. in the Orion Spur D.on the outer surface of giant molecular clouds E. in an open cluster, especially one with a lot of dust in and around it
Halo population stars have   I.   circular orbits in the plane of the galaxy.   II.  randomly tipped, elliptical orbits.   III. old stars with low metal content.   IV. young stars with heavy metal content.   a. I and II   b. I and III   c. II and III   d. II and IV   e. I and IV
The chemical abundance of population I stars   a. indicates that they were formed before the population II stars.   b. indicates that the material they formed from had been enriched with material from supernovae.   c. indicates that they contain very few heavy metals compared to halo stars.   d. depends on the temperature of the star.   e. depends on the mass of the star.

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