1. A half of a sphere bounded by a great circle. 
   半球一个巨大圆周所包围的球体的一半
2. Either half of the celestial sphere as divided by the ecliptic, the celestial equator, or the horizon. 
   半天球被黄道，天赤道或地平圈分成两半的天球的一半
3. A polar projection of half or more of the celestial sphere on a chart equipped with an adjustable overlay to show the stars visible at a particular time and place. 
   星座一览图天体球的一半或多半在平面图上的极投影图，这种图具有可调节的遮蔽物以显示在给定时刻和位置可见的恒星
4. A brilliantly burning sphere. 
   火星闪亮燃料的星球
5. A sphere of contention. 
   争辩的场所

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