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Planetary Nebulas When a star like our Sun runs out of hydrogen, it puffs off its outer layers and leaves behind a hot core. Winds from this core create a complex and graceful filamentary shell called a planetary nebula
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Document Date: 2012-12-17 11:35:04
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Planetary Nebulas When a star like our Sun runs out of hydrogen, it puffs off its outer layers and leaves behind a hot core. Winds from this core create a complex and graceful filamentary shell called a planetary nebula