n.星系,银河系,一群显赫的(出色的)人物
From this you can calculate the total mass in the Galaxy.
由此你可以算出银河系的总质量。
The Galaxy consists of 100 billion stars.
银河系由1,000亿颗恒星组成。
a galaxy of Hollywood stars
好莱坞影星的荟萃