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夜枭星云
释义
夜枭星云
Encyclopedia
理学
行星状星云
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Owl Nebula
夜枭星云
位于大熊星座的一个比较复杂的行星状星云。星表中的编号为M97和NGC3587。距离地球2030光年(621秒差距),视星等为9.9,年龄约8千年。又称猫头鹰星云。
Astronomy
Owl Nebula
夜枭星云
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Archives and Manuscripts—— SAA Basic manual series
Archives and Records Association
archives and storeroom
archives appraisal committee
archives appraisal working group
archives appraisal work organization
Archives Arrangement and Management
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archives backup from different materials
archives backup from different places
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archives catalog
Archiveschule Marburg
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Archives Classification in China
archives classification indexing
Archives Concerning Qing Dynasty Literary Inquisitions
Archives Concerning Sino-French Relations 1875~1908
Archives Concerning Sino-Japan Relations 1909-1912
Archives & Construction
archives content arrangement
archives depository Center
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