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Koupelis - In Quest of the Stars and Galaxies 1/e (Homework)

James Finch

Astronomy, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 8 / 18

Due : Monday, January 28, 2030 00:00 EST

Last Saved : n/a Saving...  ()

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8/18 (44.4%)

  • Instructions

    Here are some textbook questions from In Quest of the Stars and Galaxies 1/e by Theo Koupelis published by Jones & Bartlett Learning. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

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1. –/5 points KoupStars1 1.C.004. My Notes
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–/5
 
Using scientific notation and data found in the appendices, answer the following questions.
(a) How many times greater is the Sun's radius than the Earth's?
times

(b) The stars Rigel and Betelgeuse are both in the constellation Orion. Are they at the same distance from us?
    

What does your answer suggest about the constellations?

This answer has not been graded yet.



(c) How long does it take light to travel from Rigel to Earth?
years

What does that tell you about the current state of this star?

This answer has not been graded yet.

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2. –/4 points KoupStars1 1.Q.007. My Notes
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–/4
 
Click on the position of the vernal equinox on the figure below.


Click on the position of the autumnal equinox on the figure below.


Click on the position of the summer solstice on the figure below.


Click on the position of the winter solstice on the figure below.
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3. –/1 points KoupStars1 1.Q.013. My Notes
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–/1
 
If you see the Moon high overhead shortly before sunrise, about what phase is it in?
    
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4. –/2 points KoupStars1 2.C.002. My Notes
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1 2
–/1 –/1
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–/2
 
Saturn's semimajor axis is 9.6 AU. What are the smallest and largest distances possible between Earth and Saturn?
smallest AU
largest AU
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5. –/1 points KoupStars1 2.C.008. My Notes
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–/1
 
Suppose you live on planet X. One day the Sun is directly over a place 470 km to your south, while at your position the Sun's direction is 11 degrees off vertical. What is the radius of planet X?
km
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6. –/1 points KoupStars1 4.C.009. My Notes
Question Part
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1
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–/1
 
Matter falling toward a black hole gets compressed and heated to about 106 K. In what part of the electromagnetic spectrum would you search for black holes?
    
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7. –/4 points KoupStars1 5.C.001. My Notes
Question Part
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–/4
 
Suppose you have lenses of the following focal lengths: 24, 8, and 4 centimeters. If you wish to construct a telescope of maximum magnification, which two lenses would you use?


Which would be the objective and which the eyepiece?
objective
eyepiece

What magnification would this telescope produce?
times
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