star motions

例句：

1. 1.The star motion is so fast that it can't be seen with the naked eye.
   星运动太快了，肉眼无法看见。
2. 2.The star motion is causing a lot of confusion among astronomers.
   星运动给天文学家带来了很多困惑。
3. 3.The star motion is a fundamental principle in astronomy.
   星运动是天文学的一个基本原理。