Astronomy
Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
bartleby

Concept explainers

Textbook Question
Book Icon
Chapter 27, Problem 1E

Describe some differences between quasars and normal galaxies.

Expert Solution & Answer
Check Mark
To determine

The difference between quasars and normal galaxies.

Answer to Problem 1E

Quasar is an active galaxy or young galaxy while normal galaxy is the regular galaxy, which was once a quasar but materials falling into it runs out.

Explanation of Solution

Quasars are young galaxies having large amount of gas and dust around their centers. The constituents around centers form a disc called as accretion disc spiraling into the black holes.

Friction and gravitational effects heat the disc as more and more constituents falling into it and it emits the electromagnetic radiation having vast amount of energy.

Existence of quasar lasts until the constituents are falling into it. Once constituents run out, it remains no more quasars and converts into a normal galaxy.

Difference between quasars and normal galaxies:

  • Quasars move with more speed than normal galaxies.
  • Quasars are small in comparison to normal galaxies.
  • Quasar’s emission lines shifts far to the red wavelength ranging from 15% to more than 96% the speed of light while a normal galaxy have both red and blue shifts.
  • Quasars are 10 to 100 times more luminous than brighter normal galaxies.
  • Quasar’s infrared and X-ray bands are brighter than normal galaxy.

Conclusion:

Thus, quasar is an active galaxy or young galaxy while normal galaxy is the regular galaxy, which was once a quasar but materials falling into it runs out.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
air is pushed steadily though a forced air pipe at a steady speed of 4.0 m/s. the pipe measures 56 cm by 22 cm. how fast will air move though a narrower portion of the pipe that is also rectangular and measures 32 cm by 22 cm
No chatgpt pls will upvote
13.87 ... Interplanetary Navigation. The most efficient way to send a spacecraft from the earth to another planet is by using a Hohmann transfer orbit (Fig. P13.87). If the orbits of the departure and destination planets are circular, the Hohmann transfer orbit is an elliptical orbit whose perihelion and aphelion are tangent to the orbits of the two planets. The rockets are fired briefly at the depar- ture planet to put the spacecraft into the transfer orbit; the spacecraft then coasts until it reaches the destination planet. The rockets are then fired again to put the spacecraft into the same orbit about the sun as the destination planet. (a) For a flight from earth to Mars, in what direction must the rockets be fired at the earth and at Mars: in the direction of motion, or opposite the direction of motion? What about for a flight from Mars to the earth? (b) How long does a one- way trip from the the earth to Mars take, between the firings of the rockets? (c) To reach Mars from the…

Chapter 27 Solutions

Astronomy

Knowledge Booster
Background pattern image
Physics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Astronomy
Physics
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:OpenStax
Text book image
Stars and Galaxies (MindTap Course List)
Physics
ISBN:9781337399944
Author:Michael A. Seeds
Publisher:Cengage Learning
Text book image
Stars and Galaxies
Physics
ISBN:9781305120785
Author:Michael A. Seeds, Dana Backman
Publisher:Cengage Learning
Text book image
Foundations of Astronomy (MindTap Course List)
Physics
ISBN:9781337399920
Author:Michael A. Seeds, Dana Backman
Publisher:Cengage Learning