... polar motion 极运动 polar sequence 北极星序 polar telescope 天极仪 ...
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... 近火点 periareon 近极星序 polar sequence 近假日 sun dog ...
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north polar sequence 北极星序
sequence polar 顺极性
·2,447,543篇论文数据，部分数据来源于NoteExpress
N a series of stars in the vicinity of the N celestial pole whose accurately determined magnitudes serve as the standard for visual and photographic magnitudes of stars 极星宿 [astronomy]
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