1. Ying Bangbang the celestial sphere is called the ball, including the Earth and sun, the planets all celestial bodies. 有叫天球的硬邦邦的球，这包括地球和太阳、行星的全部天体。
2. the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; （天文学）从天顶交叉口向西顺着天赤道测量的一个角距离；
3. either of the two celestial points at which the celestial equator intersects the ecliptic. 在天球上天赤道与黄道相切的两点中的任一点。
4. the angular distance to a point on a celestial object measured north or south from the celestial equator; （天文学）到达某天体一点的角距，从天体赤道向北或向南测量得出；
5. the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body. 从观测者所在的子午线到给定天体的子午线沿着天赤道的角距离。
