Once a star ejects a planetary nebula, it becomes a white dwarf.

Name: Once a star ejects a planetary nebula, it becomes a white dwarf.
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This statement is true. When a low to medium mass star (up to 8 times the mass of the Sun) runs out of fuel, it will undergo a series of changes before eventually ejecting a planetary nebula. The remaining core will then collapse and become a white dwarf, which is a small and incredibly dense object that slowly cools over time.

Once a Star Ejects a Planetary Nebula, It Becomes a White