sidereal
01
恒星的, 星的
relating to a system of time measurement based on the positions and movements of the stars
例子
Sidereal time is often used in astronomy because it provides a more precise reference for celestial observations.
恒星时常用于天文学，因为它为天体观测提供了更精确的参考。
02
恒星的, 与星有关的
relating to the stars or constellations, especially in terms of their positions relative to Earth
例子
Sidereal day is shorter than a solar day due to the Earth's orbital motion around the sun.
由于地球绕太阳的轨道运动，恒星日比太阳日短。
