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疏散星团
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疏散星团
在大至50光年的范围内含有数十至数千颗恒星的形状不规则星团。
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疏散星团
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疏散星团
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1、疏散星团; 2、疏散星系团
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Photographic Department of Xinhua News Agency
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Photographic Encyclopedia of Traditional Beijing Opera Costumes
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