In the following eight billion years, in contrast, galactic mergers became much less common, the gargantuan black holes went dormant, and star formation slowed to a flicker.

• 相对之下，接下来的80亿年，星系的合并变得较不普遍，巨大的黑洞蛰伏休眠，恒星的形成则少得可怜。