Final answer:
When the Sun transforms into a white dwarf and eventually cools down after billions of years, it will become a black dwarf, a cold, dense, non-luminous object composed of elements like carbon and oxygen.
Step-by-step explanation:
When the Sun becomes a white dwarf, it most likely will not glow, it will be a black dwarf unlike more massive stars. A white dwarf is a stellar remnant that no longer undergoes fusion reactions and radiates away its remaining heat over billions of years. Eventually, as a white dwarf cools and its internal atomic nuclei slow down, it will transition to a black dwarf—a cold, dense stellar corpse made mostly of carbon, oxygen, and neon. This is the expected end state for stars with masses up to about 8 solar masses (M☉) which lose a significant fraction of their mass and become white dwarfs with masses less than the Chandrasekhar limit of about 1.4 M☉.