galactic space

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. The discovery of a new planet in the galactic halo has sparked excitement among astronomers.
   在银河晕中发现一个新行星，引起了天文学家的兴奋。
3. 3. Galactic dust is believed to be responsible for the formation of stars and planets.
   银河尘埃被认为是形成恒星和行星的原因。