The telescope app shows the planet’s position in a celestial coordinate system.
望远镜应用会用天球坐标系显示这颗行星的位置。
Because Earth’s axis slowly wobbles, the celestial coordinate system must be tied to a specific epoch to keep star positions consistent.
由于地轴会缓慢摆动,天球坐标系必须绑定到特定的历元,才能让恒星位置保持一致可比。