supported by electron-degeneracy pressure | Compact core = greater gravitational force | Fusion starts in a shell: hydrogen-burning shell | Increased weight of outer layers --> faster fusion --> more luminous! | leaves the main sequence: up and to the right on the H-R diagram

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1. supported by electron-degeneracy pressure | Compact core = greater gravitational force | Fusion starts in a shell: hydrogen-burning shell | Increased weight of outer layers --> faster fusion --> more luminous! | leaves the main sequence: up and to the right on the H-R diagram