寄主星系
Astronomers have long known that young or "open" star clusters must eventually disrupt and dissolve into the host galaxy.
天文学家很早就了解,年轻的或者“疏散”的星簇最终必然被他们所在的主星系分解和吞噬。
An extremely hot fireball is seen that often outshines the host galaxy.
我们看到流星通常就是发着光照亮了银河系.
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