Definitions for "White Dwarf"
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The final evolutionary stage for an average star (around 0.7 to 1.4 solar masses), when it has exhausted all of its nuclear fuel and is radiating away its internal heat. White dwarfs are highly dense and are supported against gravity by the pressure of degenerate electrons.
A collapsed, dying star that has burned most of its nuclear fuel.
Keywords:  nuclei, free, electrons, ball
a ball of nuclei and free electrons