EBK THE COSMIC PERSPECTIVE
9th Edition
ISBN: 9780135161760
Author: Voit
Publisher: VST
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Chapter 6, Problem 38EAP
To determine
To Discuss: The pros and cons of each telescope for its usage in observing matter around a black hole.
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Astronomers are always seeking to build bigger, more powerful telescopes, which will allow them to study faint galaxies that are very far away. Which of the following is the main reason they're so obsessed with studying very distant galaxies?
Group of answer choices
Light traveled much faster during the early history of the universe, so we can study how the speed of light has changed through time.
Very distant galaxies are more likely to contain planets than the Milky Way is, so we have a better chance of detecting life in those galaxies than we do in our own galaxy.
Since the light from these galaxies took so long to reach us, we're seeing them as they were when the universe was very young.
Strangely, distant galaxies are more like our Milky Way than the Milky Way's `neighbor' galaxies are, and astronomers would like to figure out why this is.
Part B: Messier 87 (M87)
You might remember the first *real* image
of a supermassive black hole that has ever
been achieved, released by the Event
Horizon Telescope Collaboration in 2017
(see image to the right). Its mass was
measured to be approximately 6 x
10° times the Sun's mass (1000 times more
massive than Sagittarius A*!)
Image credit: Event Horizon Telescope Collaboration
8.
Part a) Do the same calculation as Question 6 & 7, except now multiply the sun's mass by 6
x 10° before plugging it in to the Schwarzschild radius equation. Then divide the number by
1 AU in meters (Again just submit your answer, do not submit the unit AU).
Part b) How does the radius of M87 compare to the radius of Sagittarius A*? (Divide the
radius of M87 by the radius of Sagittarius A*.)
Suppose a spectral line from an object in space was shifted from 5007.0 to 5100.0 Angstroms. What can we tell about this object?
A) It is a star.
B) It is very cold.
C) It is blueshifted, hence coming towards us.
D) Its radial velocity is positive, meaning it is moving away from us.
E) It is a planet in a distant galaxy.
F) It is an exoplanet.
Chapter 6 Solutions
EBK THE COSMIC PERSPECTIVE
Ch. 6 - Prob. 1VSCCh. 6 - Prob. 2VSCCh. 6 - Prob. 3VSCCh. 6 - Prob. 4VSCCh. 6 - How does your eye focus light? How is a glass lens...Ch. 6 - How does a camera record light? How are images...Ch. 6 - What are the two key properties of a telescope,...Ch. 6 - What is the diffraction limit, and how does it...Ch. 6 - How do reflecting telescopes differ from...Ch. 6 - What are the three basic categories of...
Ch. 6 - Prob. 7EAPCh. 6 - What do we mean by spectral resolution? Why is...Ch. 6 - List at least three ways in which Earth's...Ch. 6 - 10. Describe how deeply each portion of the...Ch. 6 - Prob. 11EAPCh. 6 - Prob. 12EAPCh. 6 - Prob. 13EAPCh. 6 - Prob. 14EAPCh. 6 - Prob. 15EAPCh. 6 - Prob. 16EAPCh. 6 - Prob. 17EAPCh. 6 - Prob. 18EAPCh. 6 - Prob. 19EAPCh. 6 - Prob. 20EAPCh. 6 - Prob. 21EAPCh. 6 - Prob. 22EAPCh. 6 - Prob. 23EAPCh. 6 - Prob. 24EAPCh. 6 - Prob. 25EAPCh. 6 - Prob. 26EAPCh. 6 - Prob. 27EAPCh. 6 - Prob. 28EAPCh. 6 - Prob. 29EAPCh. 6 - Prob. 30EAPCh. 6 - Prob. 31EAPCh. 6 - Prob. 32EAPCh. 6 - Prob. 37EAPCh. 6 - Prob. 38EAPCh. 6 - Prob. 39EAPCh. 6 - Prob. 40EAPCh. 6 - Prob. 41EAPCh. 6 - Prob. 42EAPCh. 6 - Prob. 43EAPCh. 6 - Prob. 44EAPCh. 6 - Prob. 45EAPCh. 6 - Prob. 46EAPCh. 6 - Prob. 50EAPCh. 6 - Close Binary System. Suppose that two stars in a...Ch. 6 - Prob. 52EAPCh. 6 - Diffraction Limit of the Eye. Calculate the...Ch. 6 - Prob. 54EAPCh. 6 - Prob. 55EAPCh. 6 - Hubble’s Field of View. Large telescopes often...Ch. 6 - Prob. 57EAPCh. 6 - Visible-Light Interferometry. Technological...
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