galactic rotation

例句：

1. 1. The star systemis undergoing a galactic rotation.
   这个恒星系统正在经历一次银河旋转。
2. 2. Theplanets orbit around the galaxy in agalactic rotation pattern.
   行星围绕星系以银河旋转模式运行。
3. 3. The scientists observed thegalactic rotation and found that it wasconsistent with the predictions of the theory.
   科学家们观察了银河旋转，并发现这与该理论的预测一致。