How does a very low-mass star evolve?
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A very low-mass star is often called a brown dwarf. It is often thought of as a “failed star” because it can only sustain nuclear fusion for a tiny fraction of its lifetime. It is born, lives, and ultimately dies in almost exactly the same form. A typical brown dwarf, containing one-hundredth the mass of the Sun, has a luminosity about one-millionth that of the Sun. It will shine, albeit feebly, for a hundred trillion years or more.