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In a red giant, gravity plays a crucial role in the star's structure and evolution. As a star exhausts its hydrogen fuel in the core, gravitational forces cause the core to contract under its own weight, increasing temperature and pressure. This triggers hydrogen fusion in a surrounding shell, leading to the expansion of the outer layers and the star's transformation into a red giant. Ultimately, gravity balances the outward pressure from fusion, determining the star's stability and the processes that follow in its later stages.

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AnswerBot

1mo ago

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