It gave mean solar time, mean sidereal time, equation of time, and could chart the phases of the moon.

表盘上不仅能显示平太阳时，还能显示平恒星时、时差，记录月相。

So instead, astronomers use Sidereal time for their telescopes to ensure that they're looking at the same region of space each night.

因此，天文学家使用望远镜的恒星时间来确保他们每晚都观察到同一空间区域。

So it makes no sense to use Sidereal time on earth, because six months down the line, day and night would be completely swapped.

因此， 在地球上使用恒星时间是没有意义的，因为六个月后， 白天和黑夜将完全互换。

And all geostationary satellites, like those used for communication or navigation, they use Sidereal time to keep their orbits locked with the Earth's rotation.

所有对地静止卫星， 例如用于通信或导航的卫星，都使用恒星时来保持其轨道与地球自转锁定。