The event that marks the end of a star's evolutionary life before becoming a white dwarf is
A) a nova.
B) a planetary nebula.
C) the exhaustion of hydrogen in the core.
D) a helium flash.
Answer: B) a planetary nebula.
The event that marks the end of a star's evolutionary life before becoming a white dwarf is
A) a nova.
B) a planetary nebula.
C) the exhaustion of hydrogen in the core.
D) a helium flash.
Answer: B) a planetary nebula.