Hypernovae are
A) supernovae that occur when two red dwarfs collide.
B) supernovae that occur when 10-solar-mass stars explode.
C) supernovae that occur when stars more massive than 25 solar masses explode.
D) one theory to explain the production of gamma-ray bursters.
E) both c and d above.
Correct Answer:
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Q4: The density of a _ is greater
Q5: In A.D. 1054, Chinese astronomers observed the
Q6: _ are neutron stars that have magnetic
Q6: The mass of a neutron star is
A)
Q7: The size of a neutron star is
A)
Q9: The density of a neutron star is
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Q10: Neutron stars are expected to spin rapidly
Q15: The peculiar system SS 433 
Q17: A _ has a radius of about
Q18: Which of the following objects is considered
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