What will our sun become at the end of its life?

At the end of its life, the Sun will exhaust its nuclear fuel and enter the red giant phase, expanding significantly and engulfing the inner planets, potentially including Earth. After shedding its outer layers, it will leave behind a hot core known as a white dwarf. Over billions of years, this white dwarf will gradually cool and fade into a cold, dark remnant known as a black dwarf, although the universe is not old enough for any black dwarfs to exist yet.