What does black dwarf mean?

1 Answer
Feb 19, 2016

A black dwarf is a white dwarf that has cooled down substantially and is no longer visible.


A white dwarf does not have any internal source of heat, but is shining only because it is still hot. Its cooling depends upon its mass, composition and initial temperature. Once a white dwarf cools down to the same temperature as the cosmic microwave background, it is no longer visible and is called a black dwarf.