How much longer can M dwarfs burn their fuel compared to the Sun's expected 10 billion year lifespan?

Answer

Trillions of years

M dwarfs have incredible longevity, capable of burning their fuel for trillions of years, offering a vastly longer window for biological evolution than the Sun.

How much longer can M dwarfs burn their fuel compared to the Sun's expected 10 billion year lifespan?
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