6a. The White Dwarf
STAR LIFE · the cooling ember
What remains of a sun like star: its old core, compressed to the size of Earth while keeping half the star's mass, so dense that a teaspoon would weigh several tons. No fusion burns here anymore; a white dwarf simply glows with stored heat, cooling for billions upon billions of years. The universe is too young for any of them to have gone fully dark yet.
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