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The Case of the Missing White Dwarf - Universe Today
Despite their name, planetary nebulae have nothing to do with planets. They’re created when stars like our Sun enter the last stages of life, and puff off their outer layers. Then they shrink down to become a white dwarf star. This must have happened in the case of planetary nebula SuWt 2, located about 6,500 … Continue reading "The Case of the Missing White Dwarf"