1st Edition

ISBN: 9781938168284

Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher: OpenStax

Concept explainers

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars d…

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths…

Textbook Question

Chapter 27, Problem 17E

Why are quasars generally so much more luminous (why do they put out so much more energy) than active galaxies?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 27, Problem 16E

Chapter 27, Problem 18E

Students have asked these similar questions

Is the appearance of a quasar changing over time a sign that it has entered a new physical state, or are these objects just the extreme outliers of quasars at low activity?

Observations 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.

why are the shells visible around some elliptical galaxies significant?

Chapter 27 Solutions

Astronomy

Ch. 27 - Describe some differences between quasars and...Ch. 27 - Describe the arguments supporting the idea that...Ch. 27 - In what ways are active galaxies like quasars but...Ch. 27 - Why could the concentration of matter at the...Ch. 27 - Describe the process by which the action of a...Ch. 27 - Describe the observations that convinced...Ch. 27 - Why do astronomers believe that quasars represent...Ch. 27 - Why were quasars and active galaxies not initially...Ch. 27 - What do we now understand to be the primary...Ch. 27 - What is the typical structure we observe in a...

Ch. 27 - What evidence do we have that the luminous central...Ch. 27 - Suppose you observe a star-like object in the sky....Ch. 27 - Why don’t any of the methods for establishing...Ch. 27 - One of the early hypotheses to explain the high...Ch. 27 - A friend of yours who has watched many Star Trek...Ch. 27 - Could the Milky Way ever become an active galaxy?...Ch. 27 - Why are quasars generally so much more luminous...Ch. 27 - Suppose we detect a powerful radio source with a...Ch. 27 - A friend tries to convince you that she can easily...Ch. 27 - Show that no matter how big a redshift (z) we...Ch. 27 - If a quasar has a redshift of 3.3, at what...Ch. 27 - If a quasar is moving away from us at v/c=0.8 ,...Ch. 27 - In the chapter, we discussed that the largest...Ch. 27 - Rapid variability in quasars indicates that the...Ch. 27 - Large redshifts move the positions of spectral...Ch. 27 - Once again in this chapter, we see the use of...Ch. 27 - In the Check Your Learning section of Example...Ch. 27 - In the Check Your Learning section of Example...Ch. 27 - The quasar that appears the brightest in our sky,...

Additional Science Textbook Solutions

Find more solutions based on key concepts

Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) desi...

Cosmic Perspective Fundamentals

50. A nuclear physicist measures the momentum and corresponding relativistic energy of an atomic particle. A ta...

College Physics (10th Edition)

Under the best conditions, atmospheric turbulence limits ground-based telescopes resolution to about 1 arcsecon...

Essential University Physics: Volume 2 (3rd Edition)

Give an example of a process in which no heat is added to a system, but its temperature increases. Then give an...

An Introduction to Thermal Physics

Consider the two projectiles in GOT IT? 3.5. Suppose the 45 projectile is launched with speed v and that its in...

Essential University Physics: Volume 1 (3rd Edition)

3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...

The Cosmic Perspective

Knowledge Booster

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.