Astrea

例句：

1. 1.Astroea is a fascinating planetary system in the Milky Way galaxy.
   仙女座星系中的仙女座星云是一个令人着迷的行星系统。
2. 2. The astronomers were fascinated by the mysterious glow of the nebula.
   天文学家对神秘光芒的星云感到着迷。
3. 3. The nebula was so bright that it could be seen from Earth.
   这个星云如此明亮，可以从地球看到它。