The best sample of the true numbers of the different types of stars consists of
a. stars that appear brightest in the sky to an observer on Earth.
b. all of the stars within our solar system.
c. all the stars within a given distance from Earth.
Question 2
The mass of a neutron star is
a. several time that of the Sun.
b. about the same as that of the Sun.
c. about the same as Earth.
d. smaller than any of these.