The Sun is close to mid-life now. It will continue to shine normally for about another 6 billion years, although gradually increasing in volume and luminosity. At the age of 10.9 billion years, the Sun’s central hydrogen reserve will be exhausted and our star will rapidly enter into a new phase that will trigger the burning of its centralhelium, inflating it into a red giant . Then, 1.7 billion years after that, with itshelium exhausted and being unable to burn other elements, it will eject most of its
envelope as a planetary nebula. The Sun will thus finish its life as a white dwarf
Pic Courtesy: commons.wikimedia.org
envelope as a planetary nebula. The Sun will thus finish its life as a white dwarf
Pic Courtesy: commons.wikimedia.org
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