Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 24, Problem 2Q
To determine
The explanation for the discovery of quasars and the estimation of their distance in the universe.
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What evidence is there that quasars occur in distant galaxies? Explain.
What evidence do we have that quasars are a few parsecs or smaller in size?
What observation in astronomy, made AFTER the discovery of quasars, was a big help to astronomers
in figuring out what quasars really were?
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O the discovery that the Milky Way Galaxy has a black hole at the center with enough mass for 4 million Suns
O the understanding that most stars become white dwarfs when they die and white dwarfs are much smaller than
main-sequence stars
D
O the discovery of exoplanets (planets orbiting other stars) throughout the Galaxy
O the discovery that the galaxies mostly show a red shift
O the discovery of Herbig-Haro objects around newly forming stars
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Chapter 24 Solutions
Universe: Stars And Galaxies
Ch. 24 - Prob. 1QCh. 24 - Prob. 2QCh. 24 - Prob. 3QCh. 24 - Prob. 4QCh. 24 - Prob. 5QCh. 24 - Prob. 6QCh. 24 - Prob. 7QCh. 24 - Prob. 8QCh. 24 - Prob. 9QCh. 24 - Prob. 10Q
Ch. 24 - Prob. 11QCh. 24 - Prob. 12QCh. 24 - Prob. 13QCh. 24 - Prob. 14QCh. 24 - Prob. 15QCh. 24 - Prob. 16QCh. 24 - Prob. 17QCh. 24 - Prob. 18QCh. 24 - Prob. 19QCh. 24 - Prob. 20QCh. 24 - Prob. 21QCh. 24 - Prob. 22QCh. 24 - Prob. 23QCh. 24 - Prob. 24QCh. 24 - Prob. 25QCh. 24 - Prob. 26QCh. 24 - Prob. 27QCh. 24 - Prob. 28QCh. 24 - Prob. 29QCh. 24 - Prob. 30QCh. 24 - Prob. 31QCh. 24 - Prob. 32Q
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- What evidence do we have that the luminous central region of a quasar is small and compact?arrow_forwardWhat is the typical structure we observe in a quasar at radio frequencies?arrow_forwardDescribe the arguments supporting the idea that quasars are at the distances indicated by their redshifts.arrow_forward
- Why are quasars generally so much more luminous (why do they put out so much more energy) than active galaxies?arrow_forwardSuppose we detect a powerful radio source with a radio telescope. How could we determine whether or not this was a newly discovered quasar and not some nearby radio transmission?arrow_forwardOne of the early hypotheses to explain the high redshifts of quasars was that these objects had been ejected at very high speeds from other galaxies. This idea was rejected, because no quasars with large blueshifts have been found. Explain why we would expect to see quasars with both blueshifted and redshifted lines if they were ejected from nearby galaxies.arrow_forward
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