galactics space

例句：

1. 1.The Milky Way galaxy is the largest and most famous of all galaxies.
   银河系是所有星系中最著名、最大的一个。
2. 2.They discovered a new planet in the constellation of Orion.
   他们在猎户座发现了一个新行星。
3. 3. Galactic exploration has led to many discoveries about the universe.
   银河探索已经导致了关于宇宙的许多发现。