Satellite galaxies

Our Milky Way galaxy has two large satellite galaxies orbiting it .

有两大卫星星系环绕着我们的银河系转动。

It travels in space with two satellite galaxies , the irregular little Clouds of Magellan .

它带着两个卫星星系在空间穿梭，卫星星系是不规则的小麦哲伦星云。

We find that , in halos of fixed mass , the number of satellite galaxies has a strong dependence on the halo age , with fewer satellites in older halos .

通过研究半解析和流体动力学两种星系形成模型，我们发现，暗物质晕中的星系分布对晕的形成时间也有强烈的依赖性。

The researchers first used the Hubble Space Telescope to track the dwarf galaxy Leo I , which at 850000 light-years away is one of the most distant of the satellite galaxies swarming around the Milky Way .

研究人员首先使用哈勃太空望远镜来跟踪狮子座白矮星一号，它距离银河系85万光年，是围绕银河系运转的最远的卫星星系。