What is the expected main sequence lifespan duration for our Sun (approximately $1 M_{\odot}$)?
Answer
10 billion years
A star possessing a mass equivalent to our Sun, classified as intermediate in mass within the stellar population spectrum, is projected to maintain stable hydrogen fusion on the main sequence for a duration nearing ten billion years. This substantial lifespan is a direct consequence of its moderate mass, which dictates a relatively temperate rate of nuclear fuel consumption. This timescale is significantly longer than that of massive stars, which burn out in millions of years, yet drastically shorter than the multi-trillion-year potential lifetimes predicted for the least massive stars, like Red Dwarfs.
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Which Type Of Star Has The Shortest Life Span? - Physics Frontier
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