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What will happen to the sun after 5 billion years?

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Nothing lives forever . The sun was born 4.57 billion years ago, and to burn as bright as it does, it must consume 600 million tonnes of hydrogen, which it converts into helium — a process known as nuclear fusion — every second. However, since there is only a finite amount of hydrogen within the sun, one day it will run out. read more

About 5.4 billion years from now, the sun will have exhausted all of its hydrogen. The sun’s core will get really hot and dense, thus shrinking; however, the outer region of the sun will expand and grow. read more

An international team of astronomers says they’ve found an analog to the future Earth/ sun system in the distant star L 2 Puppis. Five billion years ago, this star was very similar to our sun as we know it today. Now L 2 Puppis a red giant. read more

The sun won't blow up, not in 5 million years and not in 5 billion years. In about 4-5 billion years, the sun will have exhausted its hydrogen fuel and start fusing helium - the additional heat this produces will cause the sun to expand into a red giant. read more

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