Hubble then began to observe more details about galaxies .

哈勃那时候开始观察星系的更多细节。

Of those galaxies 17 are new discoveries .

它们当中有17个是新发现的星系。

More dark galaxies out there ?

外面有着更多的暗星系？

Astronomers see such jets in other galaxies .

天文学家在其他星系中看到了这样的气流。

Elliptical galaxies are shaped as their name suggests .

椭圆星系的形状正如它们的名字所述。