21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 20, Problem 4QP
To determine

The magnetic field of the Milky Way has been detected.

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The spectra of the cores of Seyfert galaxies contain emission lines of highly ionized atoms that are   a. split from the strong electric fields.   b. blueshifted.   c. split from the strong magnetic fields.   d. broadened.   e. all of the above.
What happens when galaxies collide? A. Star collisions will be rare but the shapes of the galaxies will be largely distorted. B. The shapes of the galaxies will be largely distorted and many of the stars of one galaxy will collide with stars of the other galaxy. C. The shapes of the galaxies will be distorted and many stars will collide with stars of the other galaxy, as well as with other stars in the same galaxy. D. Star collisions will be rare and the two galaxies will just pass through each other without any changes. Is the answer A? Thank you!
Galaxy seeds around which galaxies, clusters, and walls grew may have been   a. caused by hot dark matter.   b. caused by baryons.   c. the result of the separation of the electromagnetic and weak forces.   d. the result of freezing water molecules shortly after the universe became transparent to photons.   e. caused by microscopic random fluctuations in the infant universe.
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