After an initial period of activity, the formation of stars in the Galactic Centre has remained dormant for billions of years. The hibernation ended by a star-formation episode that could be due to the Milky Way interacting with other galaxies.

中文翻译：

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我们银河的第二次增长突飞猛进

经过最初的活动之后，银河系中心恒星的形成一直处于休眠状态数十亿年。冬眠以恒星形成事件结束，这可能是由于银河系与其他星系相互作用所致。