Before it ejects a planetary nebula, a star is a
A)red giant.
B)black hole.
C)white dwarf.
D)supernova.

Question

Quizplus · Accepted Answer

Before ejecting a planetary nebula, a star undergoes the red giant phase. This is when the star expands and cools, causing it to appear red in color. Once the outer layers of the star are ejected, a small, hot core remains which eventually becomes a white dwarf. Black holes and supernovas are different outcomes for much more massive stars.

Before It Ejects a Planetary Nebula, a Star Is a