6 sentences

1. 在宇宙中有很多星系。

   zài yǔ​zhòu zhōng yǒu hěn​duō xīng​xì.

   There are many galaxies in the universe.

   Source: Tatoeba

2. 宇宙里有多少个星系呀？

   yǔ​zhòu li yǒu duō​shao ge xīng​xì ya?

   How many galaxies are there in the universe?

   Source: Tatoeba

3. 所有的星系将永远从视野消失。

   suǒ​yǒu de xīng​xì jiāng yǒng​yuǎn cóng shì​yě xiāo​shī.

   All galaxies will disappear from view forever.

   Source: CCMatrix

4. 我们还不知道宇宙中有多少个星系。

   wǒ​men hái bù​zhī​dào yǔ​zhòu zhōng yǒu duō​shao ge xīng​xì.

   We still don't know how many galaxies there are in the universe.

   Source: UM-Corpus: Education

5. 大约再过40亿年，两个星系会发生碰撞。

   dà​yuē zài guò40 yì nián, liǎng​ge xīng​xì huì fā​shēng pèng​zhuàng.

   In about four billion years, the two galaxies will collide.

   Source: CCMatrix

6. 大约一个世纪前，我们甚至不知道星系的存在。

   dà​yuē yī​ge shì​jì qián, wǒ​men shèn​zhì bù​zhī​dào xīng​xì de cún​zài.

   About a century ago, we didn’t even know that galaxies existed.

   Source: CCMatrix