Concept explainers
(a)
The volume of the disk in cubic parsecs if the diameter of the disk is about
Answer to Problem 46Q
Volume of the disk in cubic parsecs =
Explanation of Solution
Given data:
Diameter of the disk =
Thickness of the disk =
Formula used:
Calculation:
Conclusion:
The volume of the disk in cubic parsecs =
(b)
The volume in cubic parsecs of a sphere with a radius of
Answer to Problem 46Q
Volume in cubic parsecs of a sphere with a radius of
Explanation of Solution
Given data:
Radius of the sphere centered on the sun =
Formula used:
Calculation:
Conclusion:
Volume in cubic parsecs of a sphere with a radius of
(c)
The probability of a supernova occurring within
The probability for one should expect to see supernovae within 300 pc of the Sun given that there are about 3 supernovae each century in our galaxy
Answer to Problem 46Q
Probability of a supernova occurring within
Time on average per century one should expect to see supernovae within 300 pc of the sun =
Explanation of Solution
Given data:
The radius of the sphere centered on the sun =
Number of supernovas occurring for a single century =
Formula used:
Calculation:
The probability that a supernova occurs within 300 pc of the Sun
Time on average per century, one should expect to see a supernova within 300 pc of the Sun
Conclusion:
Probability of a supernova occurring within
Time on average per century one should expect to see a supernova within 300 pc of the sun =
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Chapter 22 Solutions
Universe: Stars And Galaxies
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- Assume that the average galaxy contains 1011MSunand that the average distance between galaxies is 10 million light-years. Calculate the average density of matter (mass per unit volume) in galaxies. What fraction is this of the critical density we calculated in the chapter?arrow_forwardWhy could the concentration of matter at the center of an active galaxy like M87 not be made of stars?arrow_forward
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