汉英词典
Chinese-English Dictionary
MEANING OF 河外星系
河外星系
extragalactic star system / galaxy (not including our Galaxy)
-xīngxì银河系以外的恒星的集合体,距离地球在数百万光年以上。河外星系是和银河系相当的恒星系。
wài xīng
EXAMPLE SENTENCES

人们发现河外星系有多少个?

How many does people discover the external galaxy having?

我们用肉眼是看不到河外星系的。

Extragalactic nebula is invisible to the naked eye.

整个宇宙拥有十亿多个河外星系,一个河外星系就是一座星城,每座星城有“居民”上千亿颗。

Our Universe contains over a billion galaxies; star cities each with a hundred billion inhabitants.