Nuclear reactions in such a star's core, the source of power for nearly its entire life, deplete the available hydrogen, then the helium.
Nuclear reactions in such a star's core, the source of power for nearly its entire life, deplete the available hydrogen, then the helium.
恒星一生的能量来源，几乎都来自中心的核反应，过程中会耗尽所有可用的氢，然后是氦。