This page was last edited on 19 Novemberat Because the far-future evolution of stars depends on physical questions which are poorly understood, such as the nature of dark matter and the possibility and rate of proton decayit is not known precisely how long it will take white dwarfs to cool to blackness. The estimated time for the Sun to cool enough to become a black dwarf is about 10 15 1 quadrillion years, though it could take much longer than this, if weakly interacting massive particles WIMPs exist, as described above. The Anthropic Cosmological Principle. Barrow and Tipler estimate that it would take 10 15 years for a white dwarf to cool to 5 K;  however, if weakly interacting massive particles WIMPs exist, it is possible that interactions with these particles will keep some white dwarfs much warmer than this for approximately 10 25 years. From Wikipedia, the free encyclopedia.
They are estimated to be 11 to 12 billion years old.
The Anthropic Cosmological Principle. Look up black dwarf in Wiktionary, the free dictionary. A black dwarf is a theoretical stellar remnantspecifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or light. Reviews of Modern Physics. If protons are not stable, white dwarfs will also be kept warm by energy released from proton decay.