galactic

例句：

1. 1. The galactic center is the most massive object in our galaxy.
   银河中心是我们星系中最庞大的物体。
2. 2. Galactic clusters are regions of space where stars form together.
   星系团是恒星形成的区域。
3. 3. The discovery of a new planet in the Galactic Arm has sparked excitement among astronomers.
   在银河臂中发现一颗新行星引起了天文学家们的兴奋。