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You gave it a string for each frame
，这一点在91视频中也有详细论述
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00374-6
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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.