translation.en: It was decades before the term "black hole" was coined and people realized that black holes are real astrophysical objects -- in fact they're the death state of very massive stars that collapse catastrophically at the end of their lifetime.
translation.zh: 人们在数十年之后 才开始使用“黑洞”这一名词 并且意识到 黑洞是真实存在的天体 – 事实上，它们是一些质量极大的恒星 在它们生命的终点 发生灾难性坍缩后的 死亡状态。