What is the primary reason red dwarfs are the most numerous stars in the galaxy?

Answer

They live for trillions of years, spending a long time on the main sequence.

Massive stars burn fast and die quickly, making them statistically rare. Conversely, small, dim red dwarfs live for trillions of years, meaning they are the most numerous stars present in any snapshot of the current galactic population.

What is the primary reason red dwarfs are the most numerous stars in the galaxy?

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