Swelling and Shrinking

Yet a star does not simply shrink to its core or implode. Changes beget other changes. The process of shrinking releases gravitational energy throughout the star's interior. This energy release increases the core temperature, allowing hydrogen that was located outside the star's core to begin burning while the helium core continues to contract and heat up. At this point, the star's situation is rather paradoxical. Its outer layers are swelling up and burning brightly (called shell hydrogen burning), while its core, filled with helium ash, continues to collapse. It is a relatively short-lived state.

Telescopes Mastery

Telescopes Mastery

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