After that it is expected to become a red giant, as the hydrogen that presently comprises it is exhausted and the sun switches to burninghelium instead.
之后,据推测太阳会成变成一颗红巨星,因为到那时候现在构成太阳的氢气燃烧殆尽,太阳转而燃烧氦气。
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After a period of burninghelium and shrinking and expanding and then finally shrinking again, the Sun will wind up as tiny cinder known as a White Dwarf, fading away for the rest of time.
The energy of the Sun arises not from any burning process but from nuclear fusion, the transformation of hydrogen into helium, in part by a complicated process involving carbon and nitrogen.