Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 14, Problem 16QAP
To determine
Abundance of supermassive black holes.
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Through the use of various measurement techniques, it has been found that most galaxies are rapidly receding (moving away) from the Milky Way, and in fact, galaxies in distant superclusters are moving away from us more rapidly than nearby superclusters. This recessional motion is present throughout the Universe and is called the
What started the clumping of matter in the early universe that eventually became the seeds of large-scale formation of superclusters of galaxies?
a.
magnetic and electric field fluctuations
b.
subatomic quantum fluctuations
c.
temperature differences
d.
pressure differences
e.
none of the above
propose an explanation for the lack of gas, dust, and young stars in elliptical
galaxies.
Chapter 14 Solutions
Understanding Our Universe
Ch. 14.1 - Prob. 14.1CYUCh. 14.2 - Prob. 14.2CYUCh. 14.3 - Prob. 14.3CYUCh. 14.4 - Prob. 14.4CYUCh. 14 - Prob. 1QAPCh. 14 - Prob. 2QAPCh. 14 - Prob. 3QAPCh. 14 - Prob. 4QAPCh. 14 - Prob. 5QAPCh. 14 - Prob. 6QAP
Ch. 14 - Prob. 7QAPCh. 14 - Prob. 8QAPCh. 14 - Prob. 9QAPCh. 14 - Prob. 10QAPCh. 14 - Prob. 11QAPCh. 14 - Prob. 12QAPCh. 14 - Prob. 13QAPCh. 14 - Prob. 14QAPCh. 14 - Prob. 15QAPCh. 14 - Prob. 16QAPCh. 14 - Prob. 17QAPCh. 14 - Prob. 18QAPCh. 14 - Prob. 19QAPCh. 14 - Prob. 20QAPCh. 14 - Prob. 21QAPCh. 14 - Prob. 22QAPCh. 14 - Prob. 23QAPCh. 14 - Prob. 24QAPCh. 14 - Prob. 25QAPCh. 14 - Prob. 27QAPCh. 14 - Prob. 28QAPCh. 14 - Prob. 29QAPCh. 14 - Prob. 30QAPCh. 14 - Prob. 31QAPCh. 14 - Prob. 32QAPCh. 14 - Prob. 33QAPCh. 14 - Prob. 34QAPCh. 14 - Prob. 35QAPCh. 14 - Prob. 36QAPCh. 14 - Prob. 37QAPCh. 14 - Prob. 38QAPCh. 14 - Prob. 39QAPCh. 14 - Prob. 40QAPCh. 14 - Prob. 41QAPCh. 14 - Prob. 43QAPCh. 14 - Prob. 44QAPCh. 14 - Prob. 45QAP
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- How are distant (young) galaxies different from the galaxies that we see in the universe today?arrow_forwardWhat percentage of matter is ordinary matter? What percentage is dark matter? What makes up the rest of the Universes density?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_forward
- We know that dark matter must exist in galaxies. If not, many of the stars in a galaxy would ... a.Expand and go supernova due to the expansion of the Universe b.Fly away from the galaxy because the stars’ velocities are so large, and the galaxy would not have enough gravity to hold onto them c.Orbit the center of the galaxy normally d.Spiral in toward the center of the galaxy because most of the galaxy’s mass would be toward the centerarrow_forwardwhat evidence is there that galaxies collide and merge?arrow_forwardAs the universe expands, which type of cosmic energy has a density that falls off most quickly? 1. Dark energy density 2. Dark matter density 3. Normal matter density 4. Radiation energy densityarrow_forward
- List and briefly describe 3 of the main differences between spiral galaxies and largeelliptical galaxies.arrow_forwardObservations of quasars have shown us that many are extremely _________, emitting more energy than all the stars in a galaxy. The energy they give off comes from a very small volume, typically about the size of ___________. Some have long ______, shooting off in opposite directions. Today, astronomers understand that all the properties of quasars can be explained if they are __________ at the centers of galaxies. Astronomers can use _____________ to study images and spectra of the central regions of galaxies more clearly than earlier instruments.arrow_forwardWhy did it take so long for the existence of other galaxies to be established?arrow_forward
- Describe some differences between quasars and normal galaxies.arrow_forwardDescribe the main distinguishing features of spiral, elliptical, and irregular galaxies.arrow_forwardStarting with the determination of the size of Earth, outline a sequence of steps necessary to obtain the distance to a remote cluster of galaxies. (Hint: Review the chapter on Celestial Distances.)arrow_forward
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