- The passage of a smaller celestial body or its shadow across the disk of a larger celestial body.
掩星一个较小的星体或它的阴影通过一个较大天体的圆平面
- The position of a celestial body when it is separated from another by a45= angle.
八分圆一个天体当它成45°角与另一天体分离时所处的位置
- The path of a celestial body or an artificial satellite as it revolves around another body.
运行轨道天体绕另一天体或人造卫星绕一天体旋转所运行的轨道
- The highest point in the sky reached by the sun or another celestial body; a zenith.
天顶太阳或别的天体在天空中所达到的最高点; 天顶