2026年2月19日,川东小镇一隅。每年春节,我们都会回到这里看望外公外婆。(南方周末记者陈怡帆|摄)
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A so-called "planetary nebula" is a confusing misnomer because these clouds have nothing to do with planets. As a medium-size star nears the end, it puffs out into a red giant — about 100 to 1,000 times its original size — eventually engulfing the space around it, including any nearby worlds.
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