嗯，是的，约定俗成，某一层视界之内的算黑洞。


【 在 TexasPotato 的大作中提到: 】
: NASA对黑洞的定义是这样的
: A black hole is an astronomical object with a gravitational pull so strong that nothing, not even light, can escape it. The boundary of a black hole, called its event horizon, is defined by the velocity needed to escape exceeding the speed of light, which is the speed limit of the cosmos. Black holes form at the end of some stars’ lives, when the energy that held the star together disappears and it collapses in on itself producing a magnificent explosion.
: 黑洞是一种具有强大引力的天体，任何东西，甚至光，都无法逃脱它。黑洞的边界被称为事件视界，定义为逃逸速度超过光速所需的速度，光速是宇宙的速度极限。黑洞是在一些恒星生命结束时形成的，那时维系恒星在一起的能量消失了，它坍缩在自己身上，产生了一场壮观的爆炸。
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