How does the estimated main-sequence lifespan of a typical red dwarf compare to the current age of the universe (13.8 billion years)?
Answer
Their lifespan can stretch into the trillions of years, far exceeding the current age of the universe.
A typical red dwarf (e.g., 0.2 solar masses) has an estimated lifespan stretching into the trillions of years, meaning no star of this type has yet reached the end of its life since the universe began.
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