Universe: Stars And Galaxies
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 1Q
To determine

The reason for naming the quasi-stellar radio sources as “ quasi-stellar ” when it was first discovered.

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Explanation of Solution

Introduction:

Quasi-stellar radio sources are the source of radio waves which are emitted by the black holes which are located in the distant galaxies. The radio sources are intercepted by the electromagnetic spectrum according to the wavelengths of different radio waves coming from the different section of the universe emitted by the black holes.

Quasi-stellar radio sources were first discovered in 1950 with the help of Lovell telescope having a very small angular size. These radio sources were recorded by the Lovell telescope with other small telescopes acting as an interferometer for intercepting the long-range radio waves.

These quasi-stellar radio sources were termed as “quasar” because quasars were found as the source of radio wave emission of unknown physical origin and its photographic images resemble that of a faint star-like point of light.

Conclusion:

Thus, the quasi-stellar radios sources were first discovered in 1950 named as “quasar” because of its resemblance to the star-like faint light.

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