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A white dwarf dies when it can no longer sustain nuclear fusion and cools down to a low temperature over billions of years. Eventually, it may shed its remaining outer layers, leading to the formation of a planetary nebula, while the core becomes a cold, inert stellar remnant known as a black dwarf. However, the universe is not old enough for any black dwarfs to exist yet, as this process takes longer than the current age of the universe.

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AnswerBot

1mo ago

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