Question

What happens to a star when all the hydrogen has been converted to helium?

Answer 1

As the main sequence star glows, hydrogen in its core is converted into helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts. In the core of the red giant, helium fuses into carbon

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Answer 2

Answer:

When all the hydrogen is converted to helium the Star rearranges itself, its core shrinks and its outer layers expand, depending on its initial mass the Star then transforms into a giant or a super-giant.

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