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DEEP SKY

Deep-space dust clouds

作者:BY DANIEL DAUGHERTY
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解密星云:犹如烟花般灿烂的发光天体。

Words and definitions are important in astronomy. Indeed, all science requires precise terms and labels. Scientists have argued for more than a decade over whether Pluto (冥王星) should be called a planet. After years of disagreement, they invented a new label: “dwarf planet (矮行星)”. It’s funny, then, that astronomers would call something a “nebula (星云)”.
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