Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Question
Chapter 21, Problem 8Q
To determine
Whether the Sun is likely to end up as a neutron star. Explain why, or why not.
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If Earth's moon were replaced by a neutron star with a radius of 13 km, what would the angular diameter of the neutron star be as seen from Earth? (Hint: Use the small-angle formula, angular diameter (in arc seconds) / 2.06 ✕ 105 arc seconds = linear diameter/distance, where the linear diameter and the distance both have the same units.)
If a star is to eventually form a stellar black hole at any point in its life cycle, what must happen?
Assume a neutron star has a mass of about 1.2 times the mass of the Sun and a radius of 7 kilometers.
a) Calculate the average density of a neutron star, in kilograms per cubic centimeter.
Chapter 21 Solutions
Universe
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- What is the average density of the neutron star in Exercise 23.38? How does it compare to the average density of Earth?arrow_forwardWhich is likely to be more common in our Galaxy: white dwarfs or black holes? Why?arrow_forwardWhat is the escape velocity from the neutron star in Exercise 23.38? How much greater is it than the escape velocity from Earth?arrow_forward
- Where in the Galaxy would you expect to find Type II supernovae, which are the explosions of massive stars that go through their lives very quickly? Where would you expect to find Type I supernovae, which involve the explosions of white dwarfs?arrow_forwardWhat characteristics must a binary star have to be a good candidate for a black hole? Why is each of these characteristics important?arrow_forwardSuppose that a neutron star has a radius of 13 km and a temperature of 7,000,000 K. How luminous is it?arrow_forward
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