What is a black dwarf star?

The last stage of stellar evolution is a black dwarf. Because they emit no heat or light, these objects would be a challenge to detect if they existed today. However, at less than 14 billion years old, the universe is still too young to have created any black dwarfs! read more

A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or light. read more

In theory, white dwarfs will eventually stop emitting light and heat and become black dwarfs. Credit: NASA and H. Richer (University of British Columbia). The last stage of stellar evolution is a black dwarf. read more

A black dwarf is a white dwarf that has cooled down to the temperature of the cosmic microwave background, and so is invisible. Unlike red dwarfs, brown dwarfs, and white dwarfs, black dwarfs are entirely hypothetical. read more