A black hole has
A) about the same mass as the original star from which it formed.
B) infinite mass.
C) about half the mass of the star from which it formed.
D) a mass that widely fluctuates.
Question 2
A planetary nebula arises from
A) the remains of a solar atmosphere.
B) planetary accretion.
C) a black hole.
D) the gravitational attraction of interstellar dust.