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。

This explains where the extra day goes in the Sidereal year.

了恒星年中额外一天去向。

This is called a Sidereal year, Sidereal meaning with respect to the stars where an external observer would be.

被称为恒星年，恒星意思是外部观察者所在恒星。

Sidereal Relating to the stars A sidereal day corresponds to Earth's rotation period, measured relative to the background stars.

恒星 恒星日与地周期相对应，是相对于背景恒星测量。

If we measure the amount of time between two equinoxes, it ends up being 21 minutes shorter than a sidereal year.

如果我们测量两个春分点之间时间长度，结果会比一个恒星年短21分钟。

If we start a solar day and a Sidereal day at the same time, we'd see them slowly diverge throughout the year.

如果我们同时开始太阳日和恒星日，我们会看到它们在一年中慢慢发散。

Kepler's third law states that the squares of the sidereal periods of revolution of the planets are directly proportional to the cubes of their mean distances from the Sun.

开普勒第三定律指出，行星公周期平方与它们到太阳平均距离立方成正比。

The amount of time it takes a star or constellation to reach the same point in the sky at the same time of day is 365 days 6 hours 9 minutes 9.76 seconds, or a sidereal year.

一颗恒星或星座在一天同一时间到达天空中同一点所需时间是 365 天 6 小时 9 分 9.76 秒，或恒星年。