21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
6th Edition
ISBN: 9780393874921
Author: PALEN
Publisher: Norton, W. W. & Company, Inc.
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Chapter 19.1, Problem 19.1ACYU
To determine
Among the given options galaxies are classified based on
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Of the following groupings of galaxies, the one that is largest in size is the
a.
Local Supercluster.
b.
Local Group.
c.
filaments and voids.
d.
Coma Cluster.
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!
Quasi-stellar objects were first detected as
a.
double-lobed spiral galaxies.
b.
faint points of light with peculiar emission spectra.
c.
large regions of X-ray emissions.
d.
starlike objects with normal stellar emission spectra.
e.
galaxies with normal stellar emission spectra.
Chapter 19 Solutions
21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
Ch. 19.1 - Prob. 19.1ACYUCh. 19.1 - Prob. 19.1BCYUCh. 19.2 - Prob. 19.2CYUCh. 19.3 - Prob. 19.3CYUCh. 19.4 - Prob. 19.4CYUCh. 19 - Prob. 1QPCh. 19 - Prob. 2QPCh. 19 - Prob. 3QPCh. 19 - Prob. 4QPCh. 19 - Prob. 5QP
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- The largest structures in the universe are a. star clusters. b. galaxy clusters. c. galaxy superclusters. d. filaments and voids. e. galaxies.arrow_forwardThe evidence leads modern astronomers to conclude that at the cores of active galaxies are supermassive black holes with masses as high as a. ten solar masses. b. a thousand solar masses. c. a million solar masses. d. a billion solar masses.arrow_forwardIn a spiral galaxy, the orbital speeds of stars far from the galaxy's center distance from the center increases. as the A. increase B. decrease C. are approximately the same D. The answer changes depending on the galaxy.arrow_forward
- A galaxy whose spiral arms have a woolly or fluffy appearance are called a. flocculent. b. hairy. c. vague. d. foggy. e. fleecy.arrow_forwardWhat triggers the nucleus of a galaxy into activity? a. a nova explosion b. a type I supernova explosion c. a hypernova explosion d. a type II supernova explosion e. none of the abovearrow_forwardThe 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.arrow_forward
- If our universe is expanding, what are the implications for the separation between two stars within our galaxy? A. The two stars are moving farther apart. B. The two stars are moving closer together. C. The distance between the two stars is unaffected. D. The question is impossible to answer without more information.arrow_forwardThe lower limit of the mass of the galaxy is a. 100 solar masses. b. 100,000 solar masses. c. 100 million solar masses. d. 100 billion solar masses. e. 100 trillion solar masses.arrow_forwardOf the following objects, the one that produces the least energy is a a. supernova. b. Type 1 Seyfert galaxy. c. Type 2 Seyfert galaxy. d. quasar.arrow_forward
- The theory that waves of compression move around the galaxy triggering star formation is called a. the flocculent theory. b. the spiral compression theory. c. the density wave theory. d. the differential rotation theory. e. none of the above.arrow_forwardThe orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy. a. I b. IV c. I & IV d. II & IV e. I & IIIarrow_forwardThe big bang happened a. in the Hyades cluster. b. in the Virgo cluster. c. in the Sagittarius spiral arm. d. in the Andromeda Galaxy. e. in all of these locations.arrow_forward
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