They memorized the rising and setting points of stars and constellations at different times of the year.

他们记住了一年中不同时间星星和星座的升落点。

And the rising points of the star, Sirius, appear to be mapped by the other enclosures, which are all oriented in slightly different directions.

天狼星的升起点似乎被其他围栏所映射，这些围栏的方向略有不同。