While none yet exist, in the very distant future, black dwarfs will comprise the majority ofthe "normal matter" of the universe.

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A black dwarf is a hypothetical object that would result from a white dwarf cooling to the point where it no longer emits significant heat or light. Since the universe is not old enough for any white dwarfs to have cooled to this point yet, no black dwarfs currently exist. However, scientists predict that over trillions of years, all stars will eventually exhaust their fuel and become either white dwarfs or other dense stellar remnants, which will then cool over time to become black dwarfs. Therefore, it is possible that black dwarfs could one day make up the majority of "normal matter" in the universe. Black dwarfs are hypothetical objects that will be formed from white dwarfs after they have cooled down completely. It is estimated that it will take trillions of years for white dwarfs to cool down and become black dwarfs. Eventually, all currently known stars will exhaust their fuel and become white dwarfs, and then black dwarfs. Therefore, in the very distant future, black dwarfs will comprise the majority of "normal matter" in the universe.

While None Yet Exist, in the Very Distant Future, Black