When a star is stably fusing helium in its core, it is a ________ star.
A) main-sequence
B) asymptotic giant branch
C) helium flash
D) horizontal branch
E) white dwarf

Name: When a star is stably fusing helium in its core, it is a ________ star. A) main-sequence B) asymptotic giant branch C) helium flash D) horizontal branch E) white dwarf
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A star that is stably fusing helium in its core is on the horizontal branch of the Hertzsprung-Russell diagram.

When a Star Is Stably Fusing Helium in Its Core