What is a white dwarf?
A. It is a main-sequence star of spectral type F, which tends to look white in color.
B. It is the remains of a star that ran out of fuel for nuclear fusion.
C. It is a type of star that produces energy by gravitational contraction.
D. It is a star that follows a period-luminosity relation.
Answer:B
What is a white dwarf?
A. It is a main-sequence star of spectral type F, which tends to look white in color. B. It is the remains of a star that ran out of fuel for nuclear fusion. C. It is a type of star that produces energy by gravitational contraction. D. It is a star that follows a period-luminosity relation.