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Meridian Circle
释义
Meridian Circle
Encyclopedia
理学
天球坐标系
释
Meridian Circle
子午圈
地平坐标系或赤道坐标系中的大圆,即在地平坐标系中经过北天极的地平经圈,或在赤道坐标系中经过天顶的赤经圈。又称南北圈。
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