Today the majority of the mass of the universe is already in the form of black dwarfs, the solution to the "dark matter" problem.

Question

Quizplus · Accepted Answer

Black dwarfs are a theoretical type of stellar remnant that is predicted to form in the far future from white dwarfs that have cooled and lost all of their thermal energy. The universe is not old enough for any black dwarfs to exist yet. The majority of the mass of the universe is thought to be in the form of dark matter, which is a different and currently unknown type of matter.

Today the Majority of the Mass of the Universe Is