What Is a Black Dwarf?

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.

What is a black dwarf simple definition?

: a very small cooled remnant of white dwarf that emits no detectable light.

What is a black dwarf made of?

When a white dwarf exhausts its own supply of carbon, oxygen and free-flowing electrons, it will slowly burn out, transforming into a black dwarf. These theorized objects made of electron degenerate matter produce little, if any, light of their own—a true death of the star.