How does the predicted lifespan of the smallest red dwarfs compare to the current age of the universe (13.8 billion years)?

Answer

It can stretch for trillions of years.

Due to their extremely slow rate of hydrogen fusion, the predicted lifespans for the smallest red dwarfs can extend into the trillions of years, far exceeding the current estimated age of the universe.

How does the predicted lifespan of the smallest red dwarfs compare to the current age of the universe (13.8 billion years)?

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