我们银河系相对于几个邻近星系的的位置、速度和方向也很重要。

Our galaxy's position, speed and direction relative to several neighboring galaxies is also important.

youdao

我们银河系相对于几个邻近星系的的位置、速度和方向也很重要。

Our galaxy's position, speed and direction relative to several neighboring galaxies is also important.

youdao