Astronomy · Red Giant Star
Why is the red giant phase of a star relatively short-lived?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Due to constant expansion without fusion.
- 2Because the star immediately becomes a black hole.
- 3Because it is highly unstable and burns fuel rapidly.✓
- 4Due to insufficient helium for fusion.
Correct answer
Because it is highly unstable and burns fuel rapidly.
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