The stellar remnant that will be left after the Sun ends its main-sequence life is a white dwarf.

Name: The stellar remnant that will be left after the Sun ends its main-sequence life is a white dwarf.
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This is true. When the Sun exhausts its hydrogen fuel in its core, it will expand into a red giant and then shed its outer layers, leaving behind a hot, dense core made mostly of carbon and oxygen. This core will become a white dwarf, which will slowly cool and fade over billions of years.

The Stellar Remnant That Will Be Left After the Sun