sidereal

Tropical year , and sidereal year are two different concepts .

在即回归年与恒星年是不同的两个概念。

And this was the way in which the sidero-solar problem was resolved, for the sidereal position of the full moon is in opposition to the invisible position of the sun.

这个方法之所以得以解决恒星-太阳问题，正是因为由恒星测定的满月位置与我们无法看到的太阳位置相反。